90120292587 has 48 divisors (see below), whose sum is σ = 142921920960. Its totient is φ = 54378065664.

The previous prime is 90120292583. The next prime is 90120292601. The reversal of 90120292587 is 78529202109.

It is a happy number.

It is not a de Polignac number, because 90120292587 - 2² = 90120292583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90120292583) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12727114 + ... + 12734192.

It is an arithmetic number, because the mean of its divisors is an integer number (2977540020).

Almost surely, 2^90120292587 is an apocalyptic number.

90120292587 is a deficient number, since it is larger than the sum of its proper divisors (52801628373).

90120292587 is a wasteful number, since it uses less digits than its factorization.

90120292587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9204 (or 9201 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 90120292587 in words is "ninety billion, one hundred twenty million, two hundred ninety-two thousand, five hundred eighty-seven".