400798668629 has 4 divisors (see below), whose sum is σ = 401458963584. Its totient is φ = 400138373676.

The previous prime is 400798668623. The next prime is 400798668631. The reversal of 400798668629 is 926866897004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400798668629 - 2²⁴ = 400781891413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400798668623) 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, 330146567 + ... + 330147780.

It is an arithmetic number, because the mean of its divisors is an integer number (100364740896).

Almost surely, 2^400798668629 is an apocalyptic number.

It is an amenable number.

400798668629 is a deficient number, since it is larger than the sum of its proper divisors (660294955).

400798668629 is an equidigital number, since it uses as much as digits as its factorization.

400798668629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660294954.

The product of its (nonzero) digits is 62705664, while the sum is 65.

The spelling of 400798668629 in words is "four hundred billion, seven hundred ninety-eight million, six hundred sixty-eight thousand, six hundred twenty-nine".