90345159044 has 18 divisors (see below), whose sum is σ = 183916931310. Its totient is φ = 38719353792.

The previous prime is 90345159043. The next prime is 90345159053. The reversal of 90345159044 is 44095154309.

It can be written as a sum of positive squares in only one way, i.e., 71166232900 + 19178926144 = 266770^2 + 138488^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90345158986 and 90345159004.

It is not an unprimeable number, because it can be changed into a prime (90345159043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230472149 + ... + 230472540.

It is an arithmetic number, because the mean of its divisors is an integer number (10217607295).

Almost surely, 2^90345159044 is an apocalyptic number.

It is an amenable number.

90345159044 is an abundant number, since it is smaller than the sum of its proper divisors (93571772266).

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

90345159044 is a wasteful number, since it uses less digits than its factorization.

90345159044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460944707 (or 460944698 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 90345159044 in words is "ninety billion, three hundred forty-five million, one hundred fifty-nine thousand, forty-four".