400806988051 has 4 divisors (see below), whose sum is σ = 403265926792. Its totient is φ = 398348049312.

The previous prime is 400806988019. The next prime is 400806988081. The reversal of 400806988051 is 150889608004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400806988051 - 2⁵ = 400806988019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400806987986 and 400806988004.

It is not an unprimeable number, because it can be changed into a prime (400806988081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229469126 + ... + 1229469451.

It is an arithmetic number, because the mean of its divisors is an integer number (100816481698).

Almost surely, 2^400806988051 is an apocalyptic number.

400806988051 is a deficient number, since it is larger than the sum of its proper divisors (2458938741).

400806988051 is a wasteful number, since it uses less digits than its factorization.

400806988051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458938740.

The product of its (nonzero) digits is 552960, while the sum is 49.

The spelling of 400806988051 in words is "four hundred billion, eight hundred six million, nine hundred eighty-eight thousand, fifty-one".