400365530551 has 24 divisors (see below), whose sum is σ = 483601251744. Its totient is φ = 324643636800.

The previous prime is 400365530549. The next prime is 400365530557. The reversal of 400365530551 is 155035563004.

It is not a de Polignac number, because 400365530551 - 2¹ = 400365530549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400365530551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400365530557) 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, 1658421 + ... + 1884433.

It is an arithmetic number, because the mean of its divisors is an integer number (20150052156).

Almost surely, 2^400365530551 is an apocalyptic number.

400365530551 is a deficient number, since it is larger than the sum of its proper divisors (83235721193).

400365530551 is a wasteful number, since it uses less digits than its factorization.

400365530551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226759 (or 226740 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 37.

The spelling of 400365530551 in words is "four hundred billion, three hundred sixty-five million, five hundred thirty thousand, five hundred fifty-one".