1639977724534 has 16 divisors (see below), whose sum is σ = 2487660595200. Its totient is φ = 810757925824.

The previous prime is 1639977724459. The next prime is 1639977724573. The reversal of 1639977724534 is 4354277799361.

It is a self number, because there is not a number n which added to its sum of digits gives 1639977724534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12800139 + ... + 12927625.

It is an arithmetic number, because the mean of its divisors is an integer number (155478787200).

Almost surely, 2^{1639977724534} is an apocalyptic number.

1639977724534 is a deficient number, since it is larger than the sum of its proper divisors (847682870666).

1639977724534 is a wasteful number, since it uses less digits than its factorization.

1639977724534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199847.

The product of its digits is 240045120, while the sum is 67.

The spelling of 1639977724534 in words is "one trillion, six hundred thirty-nine billion, nine hundred seventy-seven million, seven hundred twenty-four thousand, five hundred thirty-four".