15964078379 has 4 divisors (see below), whose sum is σ = 15964744680. Its totient is φ = 15963412080.

The previous prime is 15964078357. The next prime is 15964078387. The reversal of 15964078379 is 97387046951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97387046951 = 34961 ⋅2785591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15964078379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15964078309) 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, 295817 + ... + 345594.

It is an arithmetic number, because the mean of its divisors is an integer number (3991186170).

Almost surely, 2^15964078379 is an apocalyptic number.

15964078379 is a deficient number, since it is larger than the sum of its proper divisors (666301).

15964078379 is an equidigital number, since it uses as much as digits as its factorization.

15964078379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666300.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 15964078379 in words is "fifteen billion, nine hundred sixty-four million, seventy-eight thousand, three hundred seventy-nine".