400874977637 has 2 divisors, whose sum is σ = 400874977638. Its totient is φ = 400874977636.

The previous prime is 400874977597. The next prime is 400874977669. The reversal of 400874977637 is 736779478004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353294716996 + 47580260641 = 594386^2 + 218129^2 .

It is a cyclic number.

It is not a de Polignac number, because 400874977637 - 2¹⁶ = 400874912101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400874977637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400874977687) 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 as a sum of consecutive naturals, namely, 200437488818 + 200437488819.

It is an arithmetic number, because the mean of its divisors is an integer number (200437488819).

Almost surely, 2^400874977637 is an apocalyptic number.

It is an amenable number.

400874977637 is a deficient number, since it is larger than the sum of its proper divisors (1).

400874977637 is an equidigital number, since it uses as much as digits as its factorization.

400874977637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49787136, while the sum is 62.

The spelling of 400874977637 in words is "four hundred billion, eight hundred seventy-four million, nine hundred seventy-seven thousand, six hundred thirty-seven".