64469947885542 has 12 divisors (see below), whose sum is σ = 139684887085380. Its totient is φ = 21489982628508.

The previous prime is 64469947885537. The next prime is 64469947885579. The reversal of 64469947885542 is 24558874996446.

64469947885542 is a `hidden beast` number, since 6 + 4 + 4 + 6 + 99 + 478 + 8 + 5 + 54 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1790831885692 + ... + 1790831885727.

It is an arithmetic number, because the mean of its divisors is an integer number (11640407257115).

Almost surely, 2^{64469947885542} is an apocalyptic number.

64469947885542 is an abundant number, since it is smaller than the sum of its proper divisors (75214939199838).

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

64469947885542 is a wasteful number, since it uses less digits than its factorization.

64469947885542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581663771427 (or 3581663771424 counting only the distinct ones).

The product of its digits is 16721510400, while the sum is 81.

The spelling of 64469947885542 in words is "sixty-four trillion, four hundred sixty-nine billion, nine hundred forty-seven million, eight hundred eighty-five thousand, five hundred forty-two".