400036400016 has 80 divisors (see below), whose sum is σ = 1127774984448. Its totient is φ = 121180176000.

The previous prime is 400036399993. The next prime is 400036400063. The reversal of 400036400016 is 610004630004.

It is a super-2 number, since 2×400036400016² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372455 + ... + 1638201.

Almost surely, 2^400036400016 is an apocalyptic number.

It is an amenable number.

400036400016 is an abundant number, since it is smaller than the sum of its proper divisors (727738584432).

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

400036400016 is a wasteful number, since it uses less digits than its factorization.

400036400016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268620 (or 268614 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The spelling of 400036400016 in words is "four hundred billion, thirty-six million, four hundred thousand, sixteen".