91163563925 has 12 divisors (see below), whose sum is σ = 129191793696. Its totient is φ = 62512158000.

The previous prime is 91163563891. The next prime is 91163563927. The reversal of 91163563925 is 52936536119.

It is not a de Polignac number, because 91163563925 - 2¹⁰ = 91163562901 is a prime.

It is a super-2 number, since 2×91163563925² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91163563927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260467151 + ... + 260467500.

It is an arithmetic number, because the mean of its divisors is an integer number (10765982808).

Almost surely, 2^91163563925 is an apocalyptic number.

It is an amenable number.

91163563925 is a deficient number, since it is larger than the sum of its proper divisors (38028229771).

91163563925 is a wasteful number, since it uses less digits than its factorization.

91163563925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520934668 (or 520934663 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 50.

The spelling of 91163563925 in words is "ninety-one billion, one hundred sixty-three million, five hundred sixty-three thousand, nine hundred twenty-five".