1381794781624 has 32 divisors (see below), whose sum is σ = 2634885158400. Its totient is φ = 679159690720.

The previous prime is 1381794781597. The next prime is 1381794781639. The reversal of 1381794781624 is 4261874971831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16405779 + ... + 16489789.

It is an arithmetic number, because the mean of its divisors is an integer number (82340161200).

Almost surely, 2^{1381794781624} is an apocalyptic number.

It is an amenable number.

1381794781624 is a deficient number, since it is larger than the sum of its proper divisors (1253090376776).

1381794781624 is a wasteful number, since it uses less digits than its factorization.

1381794781624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118923 (or 118919 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 61.

The spelling of 1381794781624 in words is "one trillion, three hundred eighty-one billion, seven hundred ninety-four million, seven hundred eighty-one thousand, six hundred twenty-four".