634342477545 has 256 divisors, whose sum is σ = 1435756492800. Its totient is φ = 259063971840.

The previous prime is 634342477499. The next prime is 634342477597. The reversal of 634342477545 is 545774243436.

634342477545 is a `hidden beast` number, since 6 + 3 + 4 + 3 + 4 + 24 + 77 + 545 = 666.

It is not a de Polignac number, because 634342477545 - 2⁹ = 634342477033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634342477491 and 634342477500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 24357591 + ... + 24383619.

It is an arithmetic number, because the mean of its divisors is an integer number (5608423800).

Almost surely, 2^634342477545 is an apocalyptic number.

It is an amenable number.

634342477545 is an abundant number, since it is smaller than the sum of its proper divisors (801414015255).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634342477545 is a wasteful number, since it uses less digits than its factorization.

634342477545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26145 (or 26139 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 54.

The spelling of 634342477545 in words is "six hundred thirty-four billion, three hundred forty-two million, four hundred seventy-seven thousand, five hundred forty-five".