12740963731 has 4 divisors (see below), whose sum is σ = 12864662512. Its totient is φ = 12617264952.

The previous prime is 12740963717. The next prime is 12740963747. The reversal of 12740963731 is 13736904721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12740963731 is a prime.

It is a super-2 number, since 2×12740963731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12740966731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61849236 + ... + 61849441.

It is an arithmetic number, because the mean of its divisors is an integer number (3216165628).

Almost surely, 2^12740963731 is an apocalyptic number.

12740963731 is a deficient number, since it is larger than the sum of its proper divisors (123698781).

12740963731 is a wasteful number, since it uses less digits than its factorization.

12740963731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123698780.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 12740963731 in words is "twelve billion, seven hundred forty million, nine hundred sixty-three thousand, seven hundred thirty-one".