90171677621 has 8 divisors (see below), whose sum is σ = 91830866400. Its totient is φ = 88516850800.

The previous prime is 90171677549. The next prime is 90171677633. The reversal of 90171677621 is 12677617109.

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 90171677621 - 2³⁴ = 72991808437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90171697621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1048751 + ... + 1131468.

It is an arithmetic number, because the mean of its divisors is an integer number (11478858300).

Almost surely, 2^90171677621 is an apocalyptic number.

It is an amenable number.

90171677621 is a deficient number, since it is larger than the sum of its proper divisors (1659188779).

90171677621 is a wasteful number, since it uses less digits than its factorization.

90171677621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180979.

The product of its (nonzero) digits is 222264, while the sum is 47.

The spelling of 90171677621 in words is "ninety billion, one hundred seventy-one million, six hundred seventy-seven thousand, six hundred twenty-one".