634697337961 has 4 divisors (see below), whose sum is σ = 639263506000. Its totient is φ = 630131169924.

The previous prime is 634697337889. The next prime is 634697337983. The reversal of 634697337961 is 169733796436.

634697337961 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 634697337961 - 2²⁹ = 634160467049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634697337893 and 634697337902.

It is not an unprimeable number, because it can be changed into a prime (634697337661) 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, 2283083811 + ... + 2283084088.

It is an arithmetic number, because the mean of its divisors is an integer number (159815876500).

Almost surely, 2^634697337961 is an apocalyptic number.

It is an amenable number.

634697337961 is a deficient number, since it is larger than the sum of its proper divisors (4566168039).

634697337961 is a wasteful number, since it uses less digits than its factorization.

634697337961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566168038.

The product of its digits is 92588832, while the sum is 64.

The spelling of 634697337961 in words is "six hundred thirty-four billion, six hundred ninety-seven million, three hundred thirty-seven thousand, nine hundred sixty-one".