91954992038 has 16 divisors (see below), whose sum is σ = 169763062560. Its totient is φ = 36377798976.

The previous prime is 91954991957. The next prime is 91954992091. The reversal of 91954992038 is 83029945919.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252623423 + ... + 252623786.

It is an arithmetic number, because the mean of its divisors is an integer number (10610191410).

Almost surely, 2^91954992038 is an apocalyptic number.

91954992038 is a deficient number, since it is larger than the sum of its proper divisors (77808070522).

91954992038 is a wasteful number, since it uses less digits than its factorization.

91954992038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505247231.

The product of its (nonzero) digits is 6298560, while the sum is 59.

The spelling of 91954992038 in words is "ninety-one billion, nine hundred fifty-four million, nine hundred ninety-two thousand, thirty-eight".