90231519944 has 8 divisors (see below), whose sum is σ = 169184099910. Its totient is φ = 45115759968.

The previous prime is 90231519907. The next prime is 90231519947. The reversal of 90231519944 is 44991513209.

It can be written as a sum of positive squares in only one way, i.e., 77768476900 + 12463043044 = 278870^2 + 111638^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (90231519947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5639469989 + ... + 5639470004.

Almost surely, 2^90231519944 is an apocalyptic number.

It is an amenable number.

90231519944 is a deficient number, since it is larger than the sum of its proper divisors (78952579966).

90231519944 is a wasteful number, since it uses less digits than its factorization.

90231519944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11278939999 (or 11278939995 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 90231519944 in words is "ninety billion, two hundred thirty-one million, five hundred nineteen thousand, nine hundred forty-four".