634512935491 has 8 divisors (see below), whose sum is σ = 673183602000. Its totient is φ = 595991866368.

The previous prime is 634512935471. The next prime is 634512935527. The reversal of 634512935491 is 194539215436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634512935491 is a prime.

It is a super-2 number, since 2×634512935491² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634512935471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37390606 + ... + 37407571.

It is an arithmetic number, because the mean of its divisors is an integer number (84147950250).

Almost surely, 2^634512935491 is an apocalyptic number.

634512935491 is a deficient number, since it is larger than the sum of its proper divisors (38670666509).

634512935491 is a wasteful number, since it uses less digits than its factorization.

634512935491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74798693.

The product of its digits is 3499200, while the sum is 52.

The spelling of 634512935491 in words is "six hundred thirty-four billion, five hundred twelve million, nine hundred thirty-five thousand, four hundred ninety-one".