1919597136 has 40 divisors (see below), whose sum is σ = 4960527744. Its totient is φ = 639663360.

The previous prime is 1919597131. The next prime is 1919597137. The reversal of 1919597136 is 6317959191.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919597131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298596 + ... + 304956.

Almost surely, 2^1919597136 is an apocalyptic number.

1919597136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1919597136 is an abundant number, since it is smaller than the sum of its proper divisors (3040930608).

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

1919597136 is a wasteful number, since it uses less digits than its factorization.

1919597136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12659 (or 12653 counting only the distinct ones).

The product of its digits is 459270, while the sum is 51.

The square root of 1919597136 is about 43813.2073238196. The cubic root of 1919597136 is about 1242.8060662927.

The spelling of 1919597136 in words is "one billion, nine hundred nineteen million, five hundred ninety-seven thousand, one hundred thirty-six".