1963815012 has 18 divisors (see below), whose sum is σ = 4964088038. Its totient is φ = 654604992.

The previous prime is 1963814981. The next prime is 1963815023. The reversal of 1963815012 is 2105183691.

1963815012 is a `hidden beast` number, since 1 + 9 + 638 + 1 + 5 + 0 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 991872036 + 971942976 = 31494^2 + 31176^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 54550417 = 1963815012 / (1 + 9 + 6 + 3 + 8 + 1 + 5 + 0 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27275173 + ... + 27275244.

Almost surely, 2^1963815012 is an apocalyptic number.

1963815012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1963815012 is an abundant number, since it is smaller than the sum of its proper divisors (3000273026).

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

1963815012 is a wasteful number, since it uses less digits than its factorization.

1963815012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54550427 (or 54550422 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1963815012 is about 44314.9524652797. The cubic root of 1963815012 is about 1252.2763878236.

The spelling of 1963815012 in words is "one billion, nine hundred sixty-three million, eight hundred fifteen thousand, twelve".