15749949931 has 16 divisors (see below), whose sum is σ = 17242011648. Its totient is φ = 14322268800.

The previous prime is 15749949911. The next prime is 15749949937. The reversal of 15749949931 is 13994994751.

It is not a de Polignac number, because 15749949931 - 2²¹ = 15747852779 is a prime.

It is a super-2 number, since 2×15749949931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15749949931.

It is not an unprimeable number, because it can be changed into a prime (15749949937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308856 + ... + 356218.

It is an arithmetic number, because the mean of its divisors is an integer number (1077625728).

Almost surely, 2^15749949931 is an apocalyptic number.

15749949931 is a deficient number, since it is larger than the sum of its proper divisors (1492061717).

15749949931 is a wasteful number, since it uses less digits than its factorization.

15749949931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48042.

The product of its digits is 11022480, while the sum is 61.

The spelling of 15749949931 in words is "fifteen billion, seven hundred forty-nine million, nine hundred forty-nine thousand, nine hundred thirty-one".