90671952521 has 8 divisors (see below), whose sum is σ = 92398854600. Its totient is φ = 88945647232.

The previous prime is 90671952499. The next prime is 90671952523. The reversal of 90671952521 is 12525917609.

It can be written as a sum of positive squares in 4 ways, for example, as 9540405625 + 81131546896 = 97675^2 + 284836^2 .

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 90671952521 - 2¹⁰ = 90671951497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90671952523) 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, 163751 + ... + 456243.

It is an arithmetic number, because the mean of its divisors is an integer number (11549856825).

Almost surely, 2^90671952521 is an apocalyptic number.

It is an amenable number.

90671952521 is a deficient number, since it is larger than the sum of its proper divisors (1726902079).

90671952521 is a wasteful number, since it uses less digits than its factorization.

90671952521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298395.

The product of its (nonzero) digits is 340200, while the sum is 47.

The spelling of 90671952521 in words is "ninety billion, six hundred seventy-one million, nine hundred fifty-two thousand, five hundred twenty-one".