12765994402 has 12 divisors (see below), whose sum is σ = 22275357750. Its totient is φ = 5471140416.

The previous prime is 12765994369. The next prime is 12765994403. The reversal of 12765994402 is 20449956721.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7999334721 + 4766659681 = 89439^2 + 69041^2 .

It is a super-2 number, since 2×12765994402² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (12765994403) 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 5 ways as a sum of consecutive naturals, for example, 65132527 + ... + 65132722.

Almost surely, 2^12765994402 is an apocalyptic number.

12765994402 is a deficient number, since it is larger than the sum of its proper divisors (9509363348).

12765994402 is a wasteful number, since it uses less digits than its factorization.

12765994402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130265265 (or 130265258 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 12765994402 in words is "twelve billion, seven hundred sixty-five million, nine hundred ninety-four thousand, four hundred two".