12739157949 has 32 divisors (see below), whose sum is σ = 20312817664. Its totient is φ = 6948167040.

The previous prime is 12739157917. The next prime is 12739157983. The reversal of 12739157949 is 94975193721.

It is a happy number.

It is not a de Polignac number, because 12739157949 - 2⁵ = 12739157917 is a prime.

It is a super-2 number, since 2×12739157949² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739157999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86509 + ... + 181554.

It is an arithmetic number, because the mean of its divisors is an integer number (634775552).

Almost surely, 2^12739157949 is an apocalyptic number.

It is an amenable number.

12739157949 is a deficient number, since it is larger than the sum of its proper divisors (7573659715).

12739157949 is a wasteful number, since it uses less digits than its factorization.

12739157949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268177.

The product of its digits is 4286520, while the sum is 57.

The spelling of 12739157949 in words is "twelve billion, seven hundred thirty-nine million, one hundred fifty-seven thousand, nine hundred forty-nine".