400041520864 has 48 divisors (see below), whose sum is σ = 796975502400. Its totient is φ = 197645059584.

The previous prime is 400041520763. The next prime is 400041520871. The reversal of 400041520864 is 468025140004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1123842 + ... + 1436350.

It is an arithmetic number, because the mean of its divisors is an integer number (16603656300).

Almost surely, 2^400041520864 is an apocalyptic number.

It is an amenable number.

400041520864 is a deficient number, since it is larger than the sum of its proper divisors (396933981536).

400041520864 is a wasteful number, since it uses less digits than its factorization.

400041520864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312995 (or 312987 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

Adding to 400041520864 its reverse (468025140004), we get a palindrome (868066660868).

The spelling of 400041520864 in words is "four hundred billion, forty-one million, five hundred twenty thousand, eight hundred sixty-four".