400552651441644 has 48 divisors (see below), whose sum is σ = 1006522187005440. Its totient is φ = 123246324613440.

The previous prime is 400552651441643. The next prime is 400552651441667. The reversal of 400552651441644 is 446144156255004.

It is not an unprimeable number, because it can be changed into a prime (400552651441643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23619549 + ... + 36864459.

It is an arithmetic number, because the mean of its divisors is an integer number (20969212229280).

Almost surely, 2^{400552651441644} is an apocalyptic number.

It is an amenable number.

400552651441644 is an abundant number, since it is smaller than the sum of its proper divisors (605969535563796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400552651441644 is a wasteful number, since it uses less digits than its factorization.

400552651441644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13438790 (or 13438788 counting only the distinct ones).

The product of its (nonzero) digits is 9216000, while the sum is 51.

The spelling of 400552651441644 in words is "four hundred trillion, five hundred fifty-two billion, six hundred fifty-one million, four hundred forty-one thousand, six hundred forty-four".