634121561241 has 24 divisors (see below), whose sum is σ = 1046870083584. Its totient is φ = 362332249920.

The previous prime is 634121561233. The next prime is 634121561243. The reversal of 634121561241 is 142165121436.

634121561241 is a `hidden beast` number, since 6 + 34 + 1 + 2 + 1 + 5 + 612 + 4 + 1 = 666.

It is not a de Polignac number, because 634121561241 - 2³ = 634121561233 is a prime.

It is a super-2 number, since 2×634121561241² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 634121561196 and 634121561205.

It is not an unprimeable number, because it can be changed into a prime (634121561243) 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, 711336 + ... + 1332006.

It is an arithmetic number, because the mean of its divisors is an integer number (43619586816).

Almost surely, 2^634121561241 is an apocalyptic number.

It is an amenable number.

634121561241 is a deficient number, since it is larger than the sum of its proper divisors (412748522343).

634121561241 is a wasteful number, since it uses less digits than its factorization.

634121561241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636901 (or 636898 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

Adding to 634121561241 its reverse (142165121436), we get a palindrome (776286682677).

The spelling of 634121561241 in words is "six hundred thirty-four billion, one hundred twenty-one million, five hundred sixty-one thousand, two hundred forty-one".