90190019124 has 36 divisors (see below), whose sum is σ = 233540825700. Its totient is φ = 29330087040.

The previous prime is 90190019113. The next prime is 90190019159. The reversal of 90190019124 is 42191009109.

It can be written as a sum of positive squares in 2 ways, for example, as 43715282724 + 46474736400 = 209082^2 + 215580^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30550699 + ... + 30553650.

Almost surely, 2^90190019124 is an apocalyptic number.

It is an amenable number.

90190019124 is an abundant number, since it is smaller than the sum of its proper divisors (143350806576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90190019124 is a wasteful number, since it uses less digits than its factorization.

90190019124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61104400 (or 61104395 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 90190019124 in words is "ninety billion, one hundred ninety million, nineteen thousand, one hundred twenty-four".