634365403789 has 16 divisors (see below), whose sum is σ = 730907524480. Its totient is φ = 545654439360.

The previous prime is 634365403783. The next prime is 634365403801. The reversal of 634365403789 is 987304563436.

It is a cyclic number.

It is not a de Polignac number, because 634365403789 - 2¹⁹ = 634364879501 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 (634365403783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21036417 + ... + 21066550.

It is an arithmetic number, because the mean of its divisors is an integer number (45681720280).

Almost surely, 2^634365403789 is an apocalyptic number.

It is an amenable number.

634365403789 is a deficient number, since it is larger than the sum of its proper divisors (96542120691).

634365403789 is a wasteful number, since it uses less digits than its factorization.

634365403789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42103060.

The product of its (nonzero) digits is 39191040, while the sum is 58.

The spelling of 634365403789 in words is "six hundred thirty-four billion, three hundred sixty-five million, four hundred three thousand, seven hundred eighty-nine".