400204055220100 has 72 divisors (see below), whose sum is σ = 886990956445440. Its totient is φ = 156663149675520.

The previous prime is 400204055220097. The next prime is 400204055220107. The reversal of 400204055220100 is 1022550402004.

It is a super-2 number, since 2×400204055220100² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (400204055220107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55726761 + ... + 62497039.

It is an arithmetic number, because the mean of its divisors is an integer number (12319318839520).

Almost surely, 2^{400204055220100} is an apocalyptic number.

It is an amenable number.

400204055220100 is an abundant number, since it is smaller than the sum of its proper divisors (486786901225340).

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

400204055220100 is a wasteful number, since it uses less digits than its factorization.

400204055220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6782917 (or 6782910 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The spelling of 400204055220100 in words is "four hundred trillion, two hundred four billion, fifty-five million, two hundred twenty thousand, one hundred".