634746753479 has 8 divisors (see below), whose sum is σ = 635950698240. Its totient is φ = 633543132600.

The previous prime is 634746753461. The next prime is 634746753539. The reversal of 634746753479 is 974357647436.

It is a happy number.

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-634746753479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634746753079) 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, 4040402 + ... + 4194560.

It is an arithmetic number, because the mean of its divisors is an integer number (79493837280).

Almost surely, 2^634746753479 is an apocalyptic number.

634746753479 is a deficient number, since it is larger than the sum of its proper divisors (1203944761).

634746753479 is a wasteful number, since it uses less digits than its factorization.

634746753479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161941.

The product of its digits is 320060160, while the sum is 65.

The spelling of 634746753479 in words is "six hundred thirty-four billion, seven hundred forty-six million, seven hundred fifty-three thousand, four hundred seventy-nine".