12749220494 has 4 divisors (see below), whose sum is σ = 19123830744. Its totient is φ = 6374610246.

The previous prime is 12749220493. The next prime is 12749220527. The reversal of 12749220494 is 49402294721.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749220493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3187305122 + ... + 3187305125.

It is an arithmetic number, because the mean of its divisors is an integer number (4780957686).

Almost surely, 2^12749220494 is an apocalyptic number.

12749220494 is a deficient number, since it is larger than the sum of its proper divisors (6374610250).

12749220494 is an equidigital number, since it uses as much as digits as its factorization.

12749220494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6374610249.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 12749220494 in words is "twelve billion, seven hundred forty-nine million, two hundred twenty thousand, four hundred ninety-four".