1912965645 has 16 divisors (see below), whose sum is σ = 3099490560. Its totient is φ = 1007333184.

The previous prime is 1912965631. The next prime is 1912965653. The reversal of 1912965645 is 5465692191.

It is not a de Polignac number, because 1912965645 - 2⁸ = 1912965389 is a prime.

It is a super-3 number, since 3×1912965645³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1912965594 and 1912965603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 805974 + ... + 808343.

It is an arithmetic number, because the mean of its divisors is an integer number (193718160).

Almost surely, 2^1912965645 is an apocalyptic number.

1912965645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1912965645 is a deficient number, since it is larger than the sum of its proper divisors (1186524915).

1912965645 is a wasteful number, since it uses less digits than its factorization.

1912965645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614404.

The product of its digits is 583200, while the sum is 48.

The square root of 1912965645 is about 43737.4627179035. The cubic root of 1912965645 is about 1241.3732715392.

The spelling of 1912965645 in words is "one billion, nine hundred twelve million, nine hundred sixty-five thousand, six hundred forty-five".