90671781894 has 32 divisors (see below), whose sum is σ = 184484335104. Its totient is φ = 29701368480.

The previous prime is 90671781847. The next prime is 90671781899. The reversal of 90671781894 is 49818717609.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90671781899) 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, 291397 + ... + 515999.

It is an arithmetic number, because the mean of its divisors is an integer number (5765135472).

Almost surely, 2^90671781894 is an apocalyptic number.

90671781894 is an abundant number, since it is smaller than the sum of its proper divisors (93812553210).

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

90671781894 is a wasteful number, since it uses less digits than its factorization.

90671781894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225772.

The product of its (nonzero) digits is 6096384, while the sum is 60.

The spelling of 90671781894 in words is "ninety billion, six hundred seventy-one million, seven hundred eighty-one thousand, eight hundred ninety-four".