1372781959550 has 48 divisors (see below), whose sum is σ = 2702850377040. Its totient is φ = 517848119040.

The previous prime is 1372781959499. The next prime is 1372781959561. The reversal of 1372781959550 is 559591872731.

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 23 ways as a sum of consecutive naturals, for example, 10946327 + ... + 11071026.

It is an arithmetic number, because the mean of its divisors is an integer number (56309382855).

Almost surely, 2^{1372781959550} is an apocalyptic number.

1372781959550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1372781959550 is a deficient number, since it is larger than the sum of its proper divisors (1330068417490).

1372781959550 is a wasteful number, since it uses less digits than its factorization.

1372781959550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22017437 (or 22017432 counting only the distinct ones).

The product of its (nonzero) digits is 23814000, while the sum is 62.

The spelling of 1372781959550 in words is "one trillion, three hundred seventy-two billion, seven hundred eighty-one million, nine hundred fifty-nine thousand, five hundred fifty".