455156701991 has 4 divisors (see below), whose sum is σ = 455158664184. Its totient is φ = 455154739800.

The previous prime is 455156701973. The next prime is 455156702017. The reversal of 455156701991 is 199107651554.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-455156701991 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 (455156709991) 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, 577925 + ... + 1115486.

It is an arithmetic number, because the mean of its divisors is an integer number (113789666046).

Almost surely, 2^455156701991 is an apocalyptic number.

455156701991 is a deficient number, since it is larger than the sum of its proper divisors (1962193).

455156701991 is a wasteful number, since it uses less digits than its factorization.

455156701991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962192.

The product of its (nonzero) digits is 1701000, while the sum is 53.

The spelling of 455156701991 in words is "four hundred fifty-five billion, one hundred fifty-six million, seven hundred one thousand, nine hundred ninety-one".