15749607679 has 4 divisors (see below), whose sum is σ = 16961115976. Its totient is φ = 14538099384.

The previous prime is 15749607649. The next prime is 15749607683. The reversal of 15749607679 is 97670694751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97670694751 = 7 ⋅13952956393.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15749607679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15749607649) 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, 605754129 + ... + 605754154.

It is an arithmetic number, because the mean of its divisors is an integer number (4240278994).

Almost surely, 2^15749607679 is an apocalyptic number.

15749607679 is a deficient number, since it is larger than the sum of its proper divisors (1211508297).

15749607679 is a wasteful number, since it uses less digits than its factorization.

15749607679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211508296.

The product of its (nonzero) digits is 20003760, while the sum is 61.

The spelling of 15749607679 in words is "fifteen billion, seven hundred forty-nine million, six hundred seven thousand, six hundred seventy-nine".