91570369137 has 16 divisors (see below), whose sum is σ = 132649254528. Its totient is φ = 55852312320.

The previous prime is 91570369123. The next prime is 91570369141. The reversal of 91570369137 is 73196307519.

It is not a de Polignac number, because 91570369137 - 2⁶ = 91570369073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91570369137.

It is not an unprimeable number, because it can be changed into a prime (91570369237) 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, 10384789 + ... + 10393602.

It is an arithmetic number, because the mean of its divisors is an integer number (8290578408).

Almost surely, 2^91570369137 is an apocalyptic number.

It is an amenable number.

91570369137 is a deficient number, since it is larger than the sum of its proper divisors (41078885391).

91570369137 is a wasteful number, since it uses less digits than its factorization.

91570369137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778520.

The product of its (nonzero) digits is 1071630, while the sum is 51.

The spelling of 91570369137 in words is "ninety-one billion, five hundred seventy million, three hundred sixty-nine thousand, one hundred thirty-seven".