634261401 has 32 divisors (see below), whose sum is σ = 990988800. Its totient is φ = 399822480.

The previous prime is 634261379. The next prime is 634261417. The reversal of 634261401 is 104162436.

634261401 is a `hidden beast` number, since 6 + 3 + 42 + 614 + 0 + 1 = 666.

It is not a de Polignac number, because 634261401 - 2²¹ = 632164249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (634261421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402946 + ... + 404516.

It is an arithmetic number, because the mean of its divisors is an integer number (30968400).

Almost surely, 2^634261401 is an apocalyptic number.

It is an amenable number.

634261401 is a deficient number, since it is larger than the sum of its proper divisors (356727399).

634261401 is a wasteful number, since it uses less digits than its factorization.

634261401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386 (or 2380 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 634261401 is about 25184.5468690624. The cubic root of 634261401 is about 859.1904230035.

The spelling of 634261401 in words is "six hundred thirty-four million, two hundred sixty-one thousand, four hundred one".