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80070720025 = 5244970910061
BaseRepresentation
bin100101010010010010…
…1100011101000011001
321122200021012000122011
41022210211203220121
52302441101020100
6100441201225521
75533140614302
oct1124445435031
9248607160564
1080070720025
1130a5991a08a
12136276322a1
13772099629a
143c383077a9
1521397dcbba
hex12a4963a19

80070720025 has 24 divisors (see below), whose sum is σ = 99659079000. Its totient is φ = 63817420800.

The previous prime is 80070720017. The next prime is 80070720029. The reversal of 80070720025 is 52002707008.

It can be written as a sum of positive squares in 12 ways, for example, as 29174006416 + 50896713609 = 170804^2 + 225603^2 .

It is not a de Polignac number, because 80070720025 - 23 = 80070720017 is a prime.

It is a super-2 number, since 2×800707200252 (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80070720029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7953495 + ... + 7963555.

It is an arithmetic number, because the mean of its divisors is an integer number (4152461625).

Almost surely, 280070720025 is an apocalyptic number.

It is an amenable number.

80070720025 is a deficient number, since it is larger than the sum of its proper divisors (19588358975).

80070720025 is a wasteful number, since it uses less digits than its factorization.

80070720025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229 (or 11224 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The spelling of 80070720025 in words is "eighty billion, seventy million, seven hundred twenty thousand, twenty-five".

Divisors: 1 5 25 449 709 2245 3545 10061 11225 17725 50305 251525 318341 1591705 4517389 7133249 7958525 22586945 35666245 112934725 178331225 3202828801 16014144005 80070720025