90578386531 has 8 divisors (see below), whose sum is σ = 93710065680. Its totient is φ = 87447259872.

The previous prime is 90578386501. The next prime is 90578386541. The reversal of 90578386531 is 13568387509.

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

It is a cyclic number.

It is not a de Polignac number, because 90578386531 - 2⁷ = 90578386403 is a prime.

It is a super-2 number, since 2×90578386531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90578386501) 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, 210376 + ... + 474778.

It is an arithmetic number, because the mean of its divisors is an integer number (11713758210).

Almost surely, 2^90578386531 is an apocalyptic number.

90578386531 is a deficient number, since it is larger than the sum of its proper divisors (3131679149).

90578386531 is a wasteful number, since it uses less digits than its factorization.

90578386531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276245.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 90578386531 in words is "ninety billion, five hundred seventy-eight million, three hundred eighty-six thousand, five hundred thirty-one".