91018975677 has 32 divisors (see below), whose sum is σ = 142443048960. Its totient is φ = 50623003200.

The previous prime is 91018975667. The next prime is 91018975727. The reversal of 91018975677 is 77657981019.

It is not a de Polignac number, because 91018975677 - 2⁴ = 91018975661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91018975677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91018975627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238533 + ... + 488810.

It is an arithmetic number, because the mean of its divisors is an integer number (4451345280).

Almost surely, 2^91018975677 is an apocalyptic number.

It is an amenable number.

91018975677 is a deficient number, since it is larger than the sum of its proper divisors (51424073283).

91018975677 is a wasteful number, since it uses less digits than its factorization.

91018975677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727513.

The product of its (nonzero) digits is 6667920, while the sum is 60.

The spelling of 91018975677 in words is "ninety-one billion, eighteen million, nine hundred seventy-five thousand, six hundred seventy-seven".