91564151961 has 8 divisors (see below), whose sum is σ = 124154782560. Its totient is φ = 60008144672.

The previous prime is 91564151927. The next prime is 91564151999. The reversal of 91564151961 is 16915146519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91564151961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91564151961.

It is not an unprimeable number, because it can be changed into a prime (91564151461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258655620 + ... + 258655973.

It is an arithmetic number, because the mean of its divisors is an integer number (15519347820).

Almost surely, 2^91564151961 is an apocalyptic number.

It is an amenable number.

91564151961 is a deficient number, since it is larger than the sum of its proper divisors (32590630599).

91564151961 is a wasteful number, since it uses less digits than its factorization.

91564151961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517311655.

The product of its digits is 291600, while the sum is 48.

The spelling of 91564151961 in words is "ninety-one billion, five hundred sixty-four million, one hundred fifty-one thousand, nine hundred sixty-one".