1919344342656 has 64 divisors (see below), whose sum is σ = 5490432148320. Its totient is φ = 590567488512.

The previous prime is 1919344342627. The next prime is 1919344342661. The reversal of 1919344342656 is 6562434439191.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1919344342656² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1919344342596 and 1919344342605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192237030 + ... + 192247013.

Almost surely, 2^{1919344342656} is an apocalyptic number.

1919344342656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1919344342656 is an abundant number, since it is smaller than the sum of its proper divisors (3571087805664).

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

1919344342656 is a wasteful number, since it uses less digits than its factorization.

1919344342656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384484073 (or 384484061 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 57.

The spelling of 1919344342656 in words is "one trillion, nine hundred nineteen billion, three hundred forty-four million, three hundred forty-two thousand, six hundred fifty-six".