91277486057 has 4 divisors (see below), whose sum is σ = 91418564736. Its totient is φ = 91136407380.

The previous prime is 91277486039. The next prime is 91277486077. The reversal of 91277486057 is 75068477219.

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 91277486057 - 2⁸ = 91277485801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91277485993 and 91277486011.

It is not an unprimeable number, because it can be changed into a prime (91277486077) 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, 70538369 + ... + 70539662.

It is an arithmetic number, because the mean of its divisors is an integer number (22854641184).

Almost surely, 2^91277486057 is an apocalyptic number.

It is an amenable number.

91277486057 is a deficient number, since it is larger than the sum of its proper divisors (141078679).

91277486057 is a wasteful number, since it uses less digits than its factorization.

91277486057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141078678.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 91277486057 in words is "ninety-one billion, two hundred seventy-seven million, four hundred eighty-six thousand, fifty-seven".