400877910791 has 4 divisors (see below), whose sum is σ = 400880623584. Its totient is φ = 400875198000.

The previous prime is 400877910787. The next prime is 400877910883. The reversal of 400877910791 is 197019778004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400877910791 - 2² = 400877910787 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 (400877910701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121135 + ... + 1434816.

It is an arithmetic number, because the mean of its divisors is an integer number (100220155896).

Almost surely, 2^400877910791 is an apocalyptic number.

400877910791 is a deficient number, since it is larger than the sum of its proper divisors (2712793).

400877910791 is a wasteful number, since it uses less digits than its factorization.

400877910791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712792.

The product of its (nonzero) digits is 889056, while the sum is 53.

The spelling of 400877910791 in words is "four hundred billion, eight hundred seventy-seven million, nine hundred ten thousand, seven hundred ninety-one".