91513547970 has 32 divisors (see below), whose sum is σ = 236527324992. Its totient is φ = 22526411712.

The previous prime is 91513547969. The next prime is 91513548019. The reversal of 91513547970 is 7974531519.

It is a super-2 number, since 2×91513547970² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117324672 + ... + 117325451.

It is an arithmetic number, because the mean of its divisors is an integer number (7391478906).

Almost surely, 2^91513547970 is an apocalyptic number.

91513547970 is an abundant number, since it is smaller than the sum of its proper divisors (145013777022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91513547970 is a wasteful number, since it uses less digits than its factorization.

91513547970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234650146.

The product of its (nonzero) digits is 1190700, while the sum is 51.

The spelling of 91513547970 in words is "ninety-one billion, five hundred thirteen million, five hundred forty-seven thousand, nine hundred seventy".