90272451018 has 32 divisors (see below), whose sum is σ = 189249584832. Its totient is φ = 28674172800.

The previous prime is 90272451013. The next prime is 90272451023. The reversal of 90272451018 is 81015427209.

It is an interprime number because it is at equal distance from previous prime (90272451013) and next prime (90272451023).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90272451013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4256413 + ... + 4277568.

It is an arithmetic number, because the mean of its divisors is an integer number (5914049526).

Almost surely, 2^90272451018 is an apocalyptic number.

90272451018 is an abundant number, since it is smaller than the sum of its proper divisors (98977133814).

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

90272451018 is a wasteful number, since it uses less digits than its factorization.

90272451018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8534070.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 90272451018 in words is "ninety billion, two hundred seventy-two million, four hundred fifty-one thousand, eighteen".