90070239081 has 32 divisors (see below), whose sum is σ = 127111129600. Its totient is φ = 56573354880.

The previous prime is 90070239079. The next prime is 90070239143. The reversal of 90070239081 is 18093207009.

It is not a de Polignac number, because 90070239081 - 2¹ = 90070239079 is a prime.

It is a super-2 number, since 2×90070239081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90070239031) 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, 23895765 + ... + 23899533.

It is an arithmetic number, because the mean of its divisors is an integer number (3972222800).

Almost surely, 2^90070239081 is an apocalyptic number.

It is an amenable number.

90070239081 is a deficient number, since it is larger than the sum of its proper divisors (37040890519).

90070239081 is a wasteful number, since it uses less digits than its factorization.

90070239081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5989.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 90070239081 in words is "ninety billion, seventy million, two hundred thirty-nine thousand, eighty-one".