12787692949 has 16 divisors (see below), whose sum is σ = 13729408000. Its totient is φ = 11875060080.

The previous prime is 12787692947. The next prime is 12787692997. The reversal of 12787692949 is 94929678721.

It is a cyclic number.

It is not a de Polignac number, because 12787692949 - 2¹ = 12787692947 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12787692947) 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 15 ways as a sum of consecutive naturals, for example, 177994 + ... + 239284.

It is an arithmetic number, because the mean of its divisors is an integer number (858088000).

Almost surely, 2^12787692949 is an apocalyptic number.

12787692949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12787692949 is a deficient number, since it is larger than the sum of its proper divisors (941715051).

12787692949 is a wasteful number, since it uses less digits than its factorization.

12787692949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61528.

The product of its digits is 27433728, while the sum is 64.

The spelling of 12787692949 in words is "twelve billion, seven hundred eighty-seven million, six hundred ninety-two thousand, nine hundred forty-nine".