634396948381 has 4 divisors (see below), whose sum is σ = 725025083872. Its totient is φ = 543768812892.

The previous prime is 634396948373. The next prime is 634396948399. The reversal of 634396948381 is 183849693436.

634396948381 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 634396948381 - 2³ = 634396948373 is a prime.

It is a super-2 number, since 2×634396948381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634396948321) 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, 45314067735 + ... + 45314067748.

It is an arithmetic number, because the mean of its divisors is an integer number (181256270968).

Almost surely, 2^634396948381 is an apocalyptic number.

It is an amenable number.

634396948381 is a deficient number, since it is larger than the sum of its proper divisors (90628135491).

634396948381 is an equidigital number, since it uses as much as digits as its factorization.

634396948381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90628135490.

The product of its digits is 80621568, while the sum is 64.

The spelling of 634396948381 in words is "six hundred thirty-four billion, three hundred ninety-six million, nine hundred forty-eight thousand, three hundred eighty-one".