1919243519156 has 6 divisors (see below), whose sum is σ = 3358676158530. Its totient is φ = 959621759576.

The previous prime is 1919243519129. The next prime is 1919243519161. The reversal of 1919243519156 is 6519153429191.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1908448309156 + 10795210000 = 1381466^2 + 103900^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239905439891 + ... + 239905439898.

It is an arithmetic number, because the mean of its divisors is an integer number (559779359755).

Almost surely, 2^{1919243519156} is an apocalyptic number.

It is an amenable number.

1919243519156 is a deficient number, since it is larger than the sum of its proper divisors (1439432639374).

1919243519156 is a wasteful number, since it uses less digits than its factorization.

1919243519156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479810879793 (or 479810879791 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 56.

The spelling of 1919243519156 in words is "one trillion, nine hundred nineteen billion, two hundred forty-three million, five hundred nineteen thousand, one hundred fifty-six".