855393932477 has 4 divisors (see below), whose sum is σ = 977593065696. Its totient is φ = 733194799260.

The previous prime is 855393932423. The next prime is 855393932479. The reversal of 855393932477 is 774239393558.

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, and also an emirpimes, since its reverse is a distinct semiprime: 774239393558 = 2 ⋅387119696779.

It is not a de Polignac number, because 855393932477 - 2²⁴ = 855377155261 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 (855393932479) 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, 61099566599 + ... + 61099566612.

It is an arithmetic number, because the mean of its divisors is an integer number (244398266424).

Almost surely, 2^855393932477 is an apocalyptic number.

It is an amenable number.

855393932477 is a deficient number, since it is larger than the sum of its proper divisors (122199133219).

855393932477 is a wasteful number, since it uses less digits than its factorization.

855393932477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122199133218.

The product of its digits is 171460800, while the sum is 65.

The spelling of 855393932477 in words is "eight hundred fifty-five billion, three hundred ninety-three million, nine hundred thirty-two thousand, four hundred seventy-seven".