400732313557 has 4 divisors (see below), whose sum is σ = 401688715680. Its totient is φ = 399775911436.

The previous prime is 400732313507. The next prime is 400732313591. The reversal of 400732313557 is 755313237004.

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 400732313557 - 2²³ = 400723924949 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 (400732313507) 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, 478200433 + ... + 478201270.

It is an arithmetic number, because the mean of its divisors is an integer number (100422178920).

Almost surely, 2^400732313557 is an apocalyptic number.

It is an amenable number.

400732313557 is a deficient number, since it is larger than the sum of its proper divisors (956402123).

400732313557 is an equidigital number, since it uses as much as digits as its factorization.

400732313557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956402122.

The product of its (nonzero) digits is 264600, while the sum is 40.

The spelling of 400732313557 in words is "four hundred billion, seven hundred thirty-two million, three hundred thirteen thousand, five hundred fifty-seven".