91845937497 has 16 divisors (see below), whose sum is σ = 129773911680. Its totient is φ = 57677289600.

The previous prime is 91845937489. The next prime is 91845937499. The reversal of 91845937497 is 79473954819.

It is not a de Polignac number, because 91845937497 - 2³ = 91845937489 is a prime.

It is a super-3 number, since 3×91845937497³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91845937499) 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, 12870829 + ... + 12877962.

It is an arithmetic number, because the mean of its divisors is an integer number (8110869480).

Almost surely, 2^91845937497 is an apocalyptic number.

It is an amenable number.

91845937497 is a deficient number, since it is larger than the sum of its proper divisors (37927974183).

91845937497 is a wasteful number, since it uses less digits than its factorization.

91845937497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25748864.

The product of its digits is 68584320, while the sum is 66.

The spelling of 91845937497 in words is "ninety-one billion, eight hundred forty-five million, nine hundred thirty-seven thousand, four hundred ninety-seven".