15946448747 has 4 divisors (see below), whose sum is σ = 16496326320. Its totient is φ = 15396571176.

The previous prime is 15946448741. The next prime is 15946448759. The reversal of 15946448747 is 74784464951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74784464951 = 7 ⋅10683494993.

It is a cyclic number.

It is not a de Polignac number, because 15946448747 - 2⁸ = 15946448491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15946448741) 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, 274938743 + ... + 274938800.

It is an arithmetic number, because the mean of its divisors is an integer number (4124081580).

Almost surely, 2^15946448747 is an apocalyptic number.

15946448747 is a deficient number, since it is larger than the sum of its proper divisors (549877573).

15946448747 is an equidigital number, since it uses as much as digits as its factorization.

15946448747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549877572.

The product of its digits is 27095040, while the sum is 59.

The spelling of 15946448747 in words is "fifteen billion, nine hundred forty-six million, four hundred forty-eight thousand, seven hundred forty-seven".