634177061 has 24 divisors (see below), whose sum is σ = 791887320. Its totient is φ = 504548352.

The previous prime is 634177051. The next prime is 634177097. The reversal of 634177061 is 160771436.

It can be written as a sum of positive squares in 4 ways, for example, as 400240036 + 233937025 = 20006^2 + 15295^2 .

It is a de Polignac number, because none of the positive numbers 2^k-634177061 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634177001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55595 + ... + 66023.

It is an arithmetic number, because the mean of its divisors is an integer number (32995305).

Almost surely, 2^634177061 is an apocalyptic number.

It is an amenable number.

634177061 is a deficient number, since it is larger than the sum of its proper divisors (157710259).

634177061 is a wasteful number, since it uses less digits than its factorization.

634177061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10533 (or 10526 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 634177061 is about 25182.8723738973. The cubic root of 634177061 is about 859.1523381107.

The spelling of 634177061 in words is "six hundred thirty-four million, one hundred seventy-seven thousand, sixty-one".