15938309961 has 96 divisors (see below), whose sum is σ = 28956262400. Its totient is φ = 8242715520.

The previous prime is 15938309951. The next prime is 15938310049. The reversal of 15938309961 is 16990383951.

It is not a de Polignac number, because 15938309961 - 2⁷ = 15938309833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15938309898 and 15938309907.

It is not an unprimeable number, because it can be changed into a prime (15938309911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2928735 + ... + 2934171.

Almost surely, 2^15938309961 is an apocalyptic number.

It is an amenable number.

15938309961 is a deficient number, since it is larger than the sum of its proper divisors (13017952439).

15938309961 is a wasteful number, since it uses less digits than its factorization.

15938309961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579 (or 5576 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 54.

The spelling of 15938309961 in words is "fifteen billion, nine hundred thirty-eight million, three hundred nine thousand, nine hundred sixty-one".