91725840061 has 8 divisors (see below), whose sum is σ = 92996553024. Its totient is φ = 90455510880.

The previous prime is 91725840047. The next prime is 91725840071. The reversal of 91725840061 is 16004852719.

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 91725840061 - 2²⁷ = 91591622333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91725840071) 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, 403230 + ... + 588256.

It is an arithmetic number, because the mean of its divisors is an integer number (11624569128).

Almost surely, 2^91725840061 is an apocalyptic number.

It is an amenable number.

91725840061 is a deficient number, since it is larger than the sum of its proper divisors (1270712963).

91725840061 is a wasteful number, since it uses less digits than its factorization.

91725840061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191891.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 91725840061 in words is "ninety-one billion, seven hundred twenty-five million, eight hundred forty thousand, sixty-one".