400502784400851 has 16 divisors (see below), whose sum is σ = 582568477285248. Its totient is φ = 242721054950400.

The previous prime is 400502784400787. The next prime is 400502784400853. The reversal of 400502784400851 is 158004487205004.

It is a happy number.

It is not a de Polignac number, because 400502784400851 - 2⁶ = 400502784400787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400502784400851.

It is not an unprimeable number, because it can be changed into a prime (400502784400853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196603630 + ... + 198630291.

It is an arithmetic number, because the mean of its divisors is an integer number (36410529830328).

Almost surely, 2^{400502784400851} is an apocalyptic number.

400502784400851 is a deficient number, since it is larger than the sum of its proper divisors (182065692884397).

400502784400851 is a wasteful number, since it uses less digits than its factorization.

400502784400851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395264642.

The product of its (nonzero) digits is 1433600, while the sum is 48.

The spelling of 400502784400851 in words is "four hundred trillion, five hundred two billion, seven hundred eighty-four million, four hundred thousand, eight hundred fifty-one".