400764731057 has 4 divisors (see below), whose sum is σ = 404655650880. Its totient is φ = 396873811236.

The previous prime is 400764731053. The next prime is 400764731069. The reversal of 400764731057 is 750137467004.

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 400764731057 - 2² = 400764731053 is a prime.

It is a super-2 number, since 2×400764731057² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400764730999 and 400764731017.

It is not an unprimeable number, because it can be changed into a prime (400764731051) 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, 1945459757 + ... + 1945459962.

It is an arithmetic number, because the mean of its divisors is an integer number (101163912720).

Almost surely, 2^400764731057 is an apocalyptic number.

It is an amenable number.

400764731057 is a deficient number, since it is larger than the sum of its proper divisors (3890919823).

400764731057 is a wasteful number, since it uses less digits than its factorization.

400764731057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890919822.

The product of its (nonzero) digits is 493920, while the sum is 44.

The spelling of 400764731057 in words is "four hundred billion, seven hundred sixty-four million, seven hundred thirty-one thousand, fifty-seven".