634403153566242 has 64 divisors (see below), whose sum is σ = 1447931676274560. Its totient is φ = 205746036368832.

The previous prime is 634403153566219. The next prime is 634403153566271. The reversal of 634403153566242 is 242665351304436.

634403153566242 is a `hidden beast` number, since 6 + 3 + 4 + 4 + 0 + 3 + 1 + 5 + 3 + 5 + 6 + 624 + 2 = 666.

634403153566242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×634403153566242² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60206893 + ... + 69954815.

It is an arithmetic number, because the mean of its divisors is an integer number (22623932441790).

Almost surely, 2^{634403153566242} is an apocalyptic number.

634403153566242 is an abundant number, since it is smaller than the sum of its proper divisors (813528522708318).

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

634403153566242 is a wasteful number, since it uses less digits than its factorization.

634403153566242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9780544 (or 9780538 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 54.

The spelling of 634403153566242 in words is "six hundred thirty-four trillion, four hundred three billion, one hundred fifty-three million, five hundred sixty-six thousand, two hundred forty-two".