90449663973 has 32 divisors (see below), whose sum is σ = 128997348480. Its totient is φ = 56175759360.

The previous prime is 90449663957. The next prime is 90449663987. The reversal of 90449663973 is 37936694409.

It is not a de Polignac number, because 90449663973 - 2⁴ = 90449663957 is a prime.

It is a super-2 number, since 2×90449663973² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90449663903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2370063 + ... + 2407923.

It is an arithmetic number, because the mean of its divisors is an integer number (4031167140).

Almost surely, 2^90449663973 is an apocalyptic number.

It is an amenable number.

90449663973 is a deficient number, since it is larger than the sum of its proper divisors (38547684507).

90449663973 is a wasteful number, since it uses less digits than its factorization.

90449663973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38357.

The product of its (nonzero) digits is 26453952, while the sum is 60.

The spelling of 90449663973 in words is "ninety billion, four hundred forty-nine million, six hundred sixty-three thousand, nine hundred seventy-three".