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80898808975 = 523235952359
BaseRepresentation
bin100101101010111110…
…0011101110010001111
321201210222101022010021
41023111330131302033
52311140043341400
6101055302123011
75562514346635
oct1132574356217
9251728338107
1080898808975
11313442a5616
1213818a20467
13782340234a
143cb62a5355
15218736271a
hex12d5f1dc8f

80898808975 has 6 divisors (see below), whose sum is σ = 100314523160. Its totient is φ = 64719047160.

The previous prime is 80898808957. The next prime is 80898808979. The reversal of 80898808975 is 57980889808.

It is a happy number.

It is not a de Polignac number, because 80898808975 - 227 = 80764591247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80898808979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1617976155 + ... + 1617976204.

Almost surely, 280898808975 is an apocalyptic number.

80898808975 is a deficient number, since it is larger than the sum of its proper divisors (19415714185).

80898808975 is a wasteful number, since it uses less digits than its factorization.

80898808975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235952369 (or 3235952364 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 70.

The spelling of 80898808975 in words is "eighty billion, eight hundred ninety-eight million, eight hundred eight thousand, nine hundred seventy-five".

Divisors: 1 5 25 3235952359 16179761795 80898808975