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80908061885 = 572311658911
BaseRepresentation
bin100101101011001111…
…1110000110010111101
321201211121210101201122
41023112133300302331
52311144430440020
6101100232320325
75562656115230
oct1132637606275
9251747711648
1080908061885
1131349545452
121381bb430a5
1378252c1b41
143cb75d3417
15218808e125
hex12d67f0cbd

80908061885 has 8 divisors (see below), whose sum is σ = 110959627776. Its totient is φ = 55479813840.

The previous prime is 80908061867. The next prime is 80908061917. The reversal of 80908061885 is 58816080908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80908061885 - 214 = 80908045501 is a prime.

It is a super-2 number, since 2×809080618852 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155829421 + ... + 1155829490.

It is an arithmetic number, because the mean of its divisors is an integer number (13869953472).

Almost surely, 280908061885 is an apocalyptic number.

It is an amenable number.

80908061885 is a deficient number, since it is larger than the sum of its proper divisors (30051565891).

80908061885 is a wasteful number, since it uses less digits than its factorization.

80908061885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311658923.

The product of its (nonzero) digits is 1105920, while the sum is 53.

The spelling of 80908061885 in words is "eighty billion, nine hundred eight million, sixty-one thousand, eight hundred eighty-five".

Divisors: 1 5 7 35 2311658911 11558294555 16181612377 80908061885