1913796978642 has 24 divisors (see below), whose sum is σ = 4258629314316. Its totient is φ = 620690911776.

The previous prime is 1913796978607. The next prime is 1913796978703. The reversal of 1913796978642 is 2468796973191.

1913796978642 is a `hidden beast` number, since 1 + 91 + 379 + 6 + 97 + 86 + 4 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1829772941481 + 84024037161 = 1352691^2 + 289869^2 .

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 11 ways as a sum of consecutive naturals, for example, 1436783853 + ... + 1436785184.

Almost surely, 2^{1913796978642} is an apocalyptic number.

1913796978642 is an abundant number, since it is smaller than the sum of its proper divisors (2344832335674).

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

1913796978642 is a wasteful number, since it uses less digits than its factorization.

1913796978642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873569082 (or 2873569079 counting only the distinct ones).

The product of its digits is 246903552, while the sum is 72.

The spelling of 1913796978642 in words is "one trillion, nine hundred thirteen billion, seven hundred ninety-six million, nine hundred seventy-eight thousand, six hundred forty-two".