90128580635 has 8 divisors (see below), whose sum is σ = 108181722096. Its totient is φ = 72084580960.

The previous prime is 90128580623. The next prime is 90128580637. The reversal of 90128580635 is 53608582109.

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

It is not a de Polignac number, because 90128580635 - 2²⁰ = 90127532059 is a prime.

It is a super-2 number, since 2×90128580635² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90128580635.

It is not an unprimeable number, because it can be changed into a prime (90128580637) 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, 2263736 + ... + 2303205.

It is an arithmetic number, because the mean of its divisors is an integer number (13522715262).

Almost surely, 2^90128580635 is an apocalyptic number.

90128580635 is a deficient number, since it is larger than the sum of its proper divisors (18053141461).

90128580635 is a wasteful number, since it uses less digits than its factorization.

90128580635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4570893.

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 90128580635 in words is "ninety billion, one hundred twenty-eight million, five hundred eighty thousand, six hundred thirty-five".