1338780172554 has 48 divisors (see below), whose sum is σ = 3164497805664. Its totient is φ = 405677076000.

The previous prime is 1338780172519. The next prime is 1338780172567. The reversal of 1338780172554 is 4552710878331.

1338780172554 is a `hidden beast` number, since 1 + 3 + 3 + 8 + 7 + 80 + 1 + 7 + 2 + 554 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1338780172554.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6693037 + ... + 6890159.

It is an arithmetic number, because the mean of its divisors is an integer number (65927037618).

Almost surely, 2^{1338780172554} is an apocalyptic number.

1338780172554 is an abundant number, since it is smaller than the sum of its proper divisors (1825717633110).

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

1338780172554 is a wasteful number, since it uses less digits than its factorization.

1338780172554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231443 (or 231440 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 1338780172554 in words is "one trillion, three hundred thirty-eight billion, seven hundred eighty million, one hundred seventy-two thousand, five hundred fifty-four".