1919457891364 has 12 divisors (see below), whose sum is σ = 3617439872284. Its totient is φ = 885903642144.

The previous prime is 1919457891347. The next prime is 1919457891383. The reversal of 1919457891364 is 4631987549191.

It can be written as a sum of positive squares in 2 ways, for example, as 1183221817600 + 736236073764 = 1087760^2 + 858042^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1919457891364.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18456325827 + ... + 18456325930.

Almost surely, 2^{1919457891364} is an apocalyptic number.

It is an amenable number.

1919457891364 is a deficient number, since it is larger than the sum of its proper divisors (1697981980920).

1919457891364 is a wasteful number, since it uses less digits than its factorization.

1919457891364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36912651774 (or 36912651772 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 67.

The spelling of 1919457891364 in words is "one trillion, nine hundred nineteen billion, four hundred fifty-seven million, eight hundred ninety-one thousand, three hundred sixty-four".