90891504154 has 32 divisors (see below), whose sum is σ = 151433758656. Its totient is φ = 40568699520.

The previous prime is 90891504149. The next prime is 90891504157. The reversal of 90891504154 is 45140519809.

It is a happy number.

It is a super-2 number, since 2×90891504154² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90891504157) 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, 239904 + ... + 489220.

It is an arithmetic number, because the mean of its divisors is an integer number (4732304958).

Almost surely, 2^90891504154 is an apocalyptic number.

90891504154 is a deficient number, since it is larger than the sum of its proper divisors (60542254502).

90891504154 is a wasteful number, since it uses less digits than its factorization.

90891504154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249630.

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 90891504154 in words is "ninety billion, eight hundred ninety-one million, five hundred four thousand, one hundred fifty-four".