91905570961 has 8 divisors (see below), whose sum is σ = 92902651520. Its totient is φ = 90909502848.

The previous prime is 91905570943. The next prime is 91905570971. The reversal of 91905570961 is 16907550919.

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

It is a cyclic number.

It is not a de Polignac number, because 91905570961 - 2¹⁷ = 91905439889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91905570899 and 91905570908.

It is not an unprimeable number, because it can be changed into a prime (91905570941) 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, 69861 + ... + 434386.

It is an arithmetic number, because the mean of its divisors is an integer number (11612831440).

Almost surely, 2^91905570961 is an apocalyptic number.

It is an amenable number.

91905570961 is a deficient number, since it is larger than the sum of its proper divisors (997080559).

91905570961 is a wasteful number, since it uses less digits than its factorization.

91905570961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506223.

The product of its (nonzero) digits is 765450, while the sum is 52.

The spelling of 91905570961 in words is "ninety-one billion, nine hundred five million, five hundred seventy thousand, nine hundred sixty-one".