15247953649 has 4 divisors (see below), whose sum is σ = 15264158580. Its totient is φ = 15231748720.

The previous prime is 15247953641. The next prime is 15247953671. The reversal of 15247953649 is 94635974251.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13489661025 + 1758292624 = 116145^2 + 41932^2 .

It is a cyclic number.

It is not a de Polignac number, because 15247953649 - 2³ = 15247953641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15247953649.

It is not an unprimeable number, because it can be changed into a prime (15247953641) 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 3 ways as a sum of consecutive naturals, for example, 8101054 + ... + 8102935.

It is an arithmetic number, because the mean of its divisors is an integer number (3816039645).

Almost surely, 2^15247953649 is an apocalyptic number.

It is an amenable number.

15247953649 is a deficient number, since it is larger than the sum of its proper divisors (16204931).

15247953649 is an equidigital number, since it uses as much as digits as its factorization.

15247953649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16204930.

The product of its digits is 8164800, while the sum is 55.

The spelling of 15247953649 in words is "fifteen billion, two hundred forty-seven million, nine hundred fifty-three thousand, six hundred forty-nine".