400643666222052 has 96 divisors (see below), whose sum is σ = 1025730818663040. Its totient is φ = 120703552865280.

The previous prime is 400643666221991. The next prime is 400643666222071. The reversal of 400643666222052 is 250222666346004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400643666221992 and 400643666222010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2602975848 + ... + 2603129760.

It is an arithmetic number, because the mean of its divisors is an integer number (10684696027740).

Almost surely, 2^{400643666222052} is an apocalyptic number.

It is an amenable number.

400643666222052 is an abundant number, since it is smaller than the sum of its proper divisors (625087152440988).

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

400643666222052 is a wasteful number, since it uses less digits than its factorization.

400643666222052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268093 (or 268091 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 48.

The spelling of 400643666222052 in words is "four hundred trillion, six hundred forty-three billion, six hundred sixty-six million, two hundred twenty-two thousand, fifty-two".