90597905551 has 4 divisors (see below), whose sum is σ = 90612785704. Its totient is φ = 90583025400.

The previous prime is 90597905509. The next prime is 90597905621. The reversal of 90597905551 is 15550979509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15550979509 = 13 ⋅1196229193.

It is a cyclic number.

It is not a de Polignac number, because 90597905551 - 2¹³ = 90597897359 is a prime.

It is a super-2 number, since 2×90597905551² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90597905492 and 90597905501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90597905501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7430940 + ... + 7443121.

It is an arithmetic number, because the mean of its divisors is an integer number (22653196426).

Almost surely, 2^90597905551 is an apocalyptic number.

90597905551 is a deficient number, since it is larger than the sum of its proper divisors (14880153).

90597905551 is a wasteful number, since it uses less digits than its factorization.

90597905551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14880152.

The product of its (nonzero) digits is 3189375, while the sum is 55.

The spelling of 90597905551 in words is "ninety billion, five hundred ninety-seven million, nine hundred five thousand, five hundred fifty-one".