15919165145 has 32 divisors (see below), whose sum is σ = 21561120000. Its totient is φ = 11195230464.

The previous prime is 15919165133. The next prime is 15919165147. The reversal of 15919165145 is 54156191951.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 15919165145 - 2⁶ = 15919165081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15919165145.

It is not an unprimeable number, because it can be changed into a prime (15919165147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 319106 + ... + 365604.

It is an arithmetic number, because the mean of its divisors is an integer number (673785000).

Almost surely, 2^15919165145 is an apocalyptic number.

It is an amenable number.

15919165145 is a deficient number, since it is larger than the sum of its proper divisors (5641954855).

15919165145 is a wasteful number, since it uses less digits than its factorization.

15919165145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46769.

The product of its digits is 243000, while the sum is 47.

The spelling of 15919165145 in words is "fifteen billion, nine hundred nineteen million, one hundred sixty-five thousand, one hundred forty-five".