91940600639 has 16 divisors (see below), whose sum is σ = 97789440000. Its totient is φ = 86197076640.

The previous prime is 91940600603. The next prime is 91940600669. The reversal of 91940600639 is 93600604919.

It is a cyclic number.

It is not a de Polignac number, because 91940600639 - 2⁸ = 91940600383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91940600593 and 91940600602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91940600669) 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, 707282 + ... + 827120.

It is an arithmetic number, because the mean of its divisors is an integer number (6111840000).

Almost surely, 2^91940600639 is an apocalyptic number.

91940600639 is a deficient number, since it is larger than the sum of its proper divisors (5848839361).

91940600639 is a wasteful number, since it uses less digits than its factorization.

91940600639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120278.

The product of its (nonzero) digits is 314928, while the sum is 47.

The spelling of 91940600639 in words is "ninety-one billion, nine hundred forty million, six hundred thousand, six hundred thirty-nine".