400861537287 has 16 divisors (see below), whose sum is σ = 537822888960. Its totient is φ = 265574820672.

The previous prime is 400861537267. The next prime is 400861537289. The reversal of 400861537287 is 782735168004.

It is not a de Polignac number, because 400861537287 - 2²⁰ = 400860488711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400861537289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145873 + ... + 907194.

It is an arithmetic number, because the mean of its divisors is an integer number (33613930560).

Almost surely, 2^400861537287 is an apocalyptic number.

400861537287 is a deficient number, since it is larger than the sum of its proper divisors (136961351673).

400861537287 is a wasteful number, since it uses less digits than its factorization.

400861537287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053862.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 400861537287 in words is "four hundred billion, eight hundred sixty-one million, five hundred thirty-seven thousand, two hundred eighty-seven".