400275555024720 has 80 divisors (see below), whose sum is σ = 1283642297170560. Its totient is φ = 103059453245952.

The previous prime is 400275555024671. The next prime is 400275555024757. The reversal of 400275555024720 is 27420555572004.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×400275555024720² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 400275555024720.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28755420844 + ... + 28755434763.

It is an arithmetic number, because the mean of its divisors is an integer number (16045528714632).

Almost surely, 2^{400275555024720} is an apocalyptic number.

400275555024720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400275555024720 is an abundant number, since it is smaller than the sum of its proper divisors (883366742145840).

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

400275555024720 is a wasteful number, since it uses less digits than its factorization.

400275555024720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57510855652 (or 57510855646 counting only the distinct ones).

The product of its (nonzero) digits is 3920000, while the sum is 48.

The spelling of 400275555024720 in words is "four hundred trillion, two hundred seventy-five billion, five hundred fifty-five million, twenty-four thousand, seven hundred twenty".