15676312399 has 4 divisors (see below), whose sum is σ = 17101431720. Its totient is φ = 14251193080.

The previous prime is 15676312373. The next prime is 15676312409. The reversal of 15676312399 is 99321367651.

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

It is a cyclic number.

It is not a de Polignac number, because 15676312399 - 2⁷ = 15676312271 is a prime.

It is a super-2 number, since 2×15676312399² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15676312199) 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, 712559644 + ... + 712559665.

It is an arithmetic number, because the mean of its divisors is an integer number (4275357930).

Almost surely, 2^15676312399 is an apocalyptic number.

15676312399 is a deficient number, since it is larger than the sum of its proper divisors (1425119321).

15676312399 is a wasteful number, since it uses less digits than its factorization.

15676312399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425119320.

The product of its digits is 1837080, while the sum is 52.

The spelling of 15676312399 in words is "fifteen billion, six hundred seventy-six million, three hundred twelve thousand, three hundred ninety-nine".