90801275557 has 4 divisors (see below), whose sum is σ = 95580290080. Its totient is φ = 86022261036.

The previous prime is 90801275549. The next prime is 90801275569. The reversal of 90801275557 is 75557210809.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75557210809 = 4211 ⋅17942819.

It is a cyclic number.

It is not a de Polignac number, because 90801275557 - 2³ = 90801275549 is a prime.

It is the 301333-rd Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90801275557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90801275057) by changing a digit.

It is a nontrivial repunit in base 301332.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2389507233 + ... + 2389507270.

It is an arithmetic number, because the mean of its divisors is an integer number (23895072520).

Almost surely, 2^90801275557 is an apocalyptic number.

It is an amenable number.

90801275557 is a deficient number, since it is larger than the sum of its proper divisors (4779014523).

90801275557 is a wasteful number, since it uses less digits than its factorization.

90801275557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779014522.

The product of its (nonzero) digits is 882000, while the sum is 49.

The spelling of 90801275557 in words is "ninety billion, eight hundred one million, two hundred seventy-five thousand, five hundred fifty-seven".