400299955877 has 2 divisors, whose sum is σ = 400299955878. Its totient is φ = 400299955876.

The previous prime is 400299955873. The next prime is 400299955901. The reversal of 400299955877 is 778559992004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340366061281 + 59933894596 = 583409^2 + 244814^2 .

It is a cyclic number.

It is not a de Polignac number, because 400299955877 - 2² = 400299955873 is a prime.

It is a super-3 number, since 3×400299955877³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400299955873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200149977938 + 200149977939.

It is an arithmetic number, because the mean of its divisors is an integer number (200149977939).

Almost surely, 2^400299955877 is an apocalyptic number.

It is an amenable number.

400299955877 is a deficient number, since it is larger than the sum of its proper divisors (1).

400299955877 is an equidigital number, since it uses as much as digits as its factorization.

400299955877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57153600, while the sum is 65.

The spelling of 400299955877 in words is "four hundred billion, two hundred ninety-nine million, nine hundred fifty-five thousand, eight hundred seventy-seven".