12392815850 has 24 divisors (see below), whose sum is σ = 23054393100. Its totient is φ = 4956318720.

The previous prime is 12392815819. The next prime is 12392815859. The reversal of 12392815850 is 5851829321.

It can be written as a sum of positive squares in 6 ways, for example, as 7606805089 + 4786010761 = 87217^2 + 69181^2 .

It is a super-2 number, since 2×12392815850² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12392815859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 361034 + ... + 393866.

Almost surely, 2^12392815850 is an apocalyptic number.

12392815850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12392815850 is a deficient number, since it is larger than the sum of its proper divisors (10661577250).

12392815850 is a wasteful number, since it uses less digits than its factorization.

12392815850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40394 (or 40389 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 44.

The spelling of 12392815850 in words is "twelve billion, three hundred ninety-two million, eight hundred fifteen thousand, eight hundred fifty".