90925643520 has 432 divisors, whose sum is σ = 326672341632. Its totient is φ = 23333437440.

The previous prime is 90925643513. The next prime is 90925643603. The reversal of 90925643520 is 2534652909.

It is a super-2 number, since 2×90925643520² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33026464 + ... + 33029216.

It is an arithmetic number, because the mean of its divisors is an integer number (756185976).

Almost surely, 2^90925643520 is an apocalyptic number.

90925643520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90925643520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163336170816).

90925643520 is an abundant number, since it is smaller than the sum of its proper divisors (235746698112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90925643520 is a wasteful number, since it uses less digits than its factorization.

90925643520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888 (or 2871 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 90925643520 in words is "ninety billion, nine hundred twenty-five million, six hundred forty-three thousand, five hundred twenty".