90157240987 has 8 divisors (see below), whose sum is σ = 99071263152. Its totient is φ = 81362870400.

The previous prime is 90157240981. The next prime is 90157241017. The reversal of 90157240987 is 78904275109.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90157240987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90157240981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29911314 + ... + 29914327.

It is an arithmetic number, because the mean of its divisors is an integer number (12383907894).

Almost surely, 2^90157240987 is an apocalyptic number.

90157240987 is a deficient number, since it is larger than the sum of its proper divisors (8914022165).

90157240987 is a wasteful number, since it uses less digits than its factorization.

90157240987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59825789.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 90157240987 in words is "ninety billion, one hundred fifty-seven million, two hundred forty thousand, nine hundred eighty-seven".