2631398401 has 4 divisors (see below), whose sum is σ = 2670673072. Its totient is φ = 2592123732.

The previous prime is 2631398387. The next prime is 2631398423. The reversal of 2631398401 is 1048931362.

2631398401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2631398401 - 2¹⁷ = 2631267329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2631398461) 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, 19637235 + ... + 19637368.

It is an arithmetic number, because the mean of its divisors is an integer number (667668268).

Almost surely, 2^2631398401 is an apocalyptic number.

It is an amenable number.

2631398401 is a deficient number, since it is larger than the sum of its proper divisors (39274671).

2631398401 is an equidigital number, since it uses as much as digits as its factorization.

2631398401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39274670.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 2631398401 is about 51297.1578257509. The cubic root of 2631398401 is about 1380.5819853246.

The spelling of 2631398401 in words is "two billion, six hundred thirty-one million, three hundred ninety-eight thousand, four hundred one".