15194972749 has 16 divisors (see below), whose sum is σ = 16864381440. Its totient is φ = 13573770160.

The previous prime is 15194972717. The next prime is 15194972761. The reversal of 15194972749 is 94727949151.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 15194972749 - 2⁵ = 15194972717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15194972693 and 15194972702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15194372749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2597622 + ... + 2603464.

It is an arithmetic number, because the mean of its divisors is an integer number (1054023840).

Almost surely, 2^15194972749 is an apocalyptic number.

It is an amenable number.

15194972749 is a deficient number, since it is larger than the sum of its proper divisors (1669408691).

15194972749 is a wasteful number, since it uses less digits than its factorization.

15194972749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9920.

The product of its digits is 5715360, while the sum is 58.

The spelling of 15194972749 in words is "fifteen billion, one hundred ninety-four million, nine hundred seventy-two thousand, seven hundred forty-nine".