90519515640 has 96 divisors (see below), whose sum is σ = 294225937200. Its totient is φ = 24135459840.

The previous prime is 90519515623. The next prime is 90519515659. The reversal of 90519515640 is 4651591509.

It is a happy number.

90519515640 is a `hidden beast` number, since 90 + 5 + 1 + 9 + 515 + 6 + 40 = 666.

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 23 ways as a sum of consecutive naturals, for example, 4915971 + ... + 4934349.

Almost surely, 2^90519515640 is an apocalyptic number.

90519515640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90519515640 is an abundant number, since it is smaller than the sum of its proper divisors (203706421560).

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

90519515640 is a wasteful number, since it uses less digits than its factorization.

90519515640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32077 (or 32070 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The spelling of 90519515640 in words is "ninety billion, five hundred nineteen million, five hundred fifteen thousand, six hundred forty".