461921656877 has 4 divisors (see below), whose sum is σ = 482005207200. Its totient is φ = 441838106556.

The previous prime is 461921656853. The next prime is 461921656891. The reversal of 461921656877 is 778656129164.

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 461921656877 - 2⁶ = 461921656813 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 (461921656277) 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, 10041775127 + ... + 10041775172.

It is an arithmetic number, because the mean of its divisors is an integer number (120501301800).

Almost surely, 2^461921656877 is an apocalyptic number.

It is an amenable number.

461921656877 is a deficient number, since it is larger than the sum of its proper divisors (20083550323).

461921656877 is a wasteful number, since it uses less digits than its factorization.

461921656877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20083550322.

The product of its digits is 30481920, while the sum is 62.

The spelling of 461921656877 in words is "four hundred sixty-one billion, nine hundred twenty-one million, six hundred fifty-six thousand, eight hundred seventy-seven".