91779058801 has 4 divisors (see below), whose sum is σ = 96609535600. Its totient is φ = 86948582004.

The previous prime is 91779058793. The next prime is 91779058837. The reversal of 91779058801 is 10885097719.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91779058801 - 2³ = 91779058793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91779058841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2415238371 + ... + 2415238408.

It is an arithmetic number, because the mean of its divisors is an integer number (24152383900).

Almost surely, 2^91779058801 is an apocalyptic number.

It is an amenable number.

91779058801 is a deficient number, since it is larger than the sum of its proper divisors (4830476799).

91779058801 is a wasteful number, since it uses less digits than its factorization.

91779058801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830476798.

The product of its (nonzero) digits is 1270080, while the sum is 55.

The spelling of 91779058801 in words is "ninety-one billion, seven hundred seventy-nine million, fifty-eight thousand, eight hundred one".