15144081644 has 48 divisors (see below), whose sum is σ = 28453783680. Its totient is φ = 7027138560.

The previous prime is 15144081643. The next prime is 15144081647. The reversal of 15144081644 is 44618044151.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15144081598 and 15144081607.

It is not an unprimeable number, because it can be changed into a prime (15144081643) 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, 5698364 + ... + 5701020.

It is an arithmetic number, because the mean of its divisors is an integer number (592787160).

Almost surely, 2^15144081644 is an apocalyptic number.

It is an amenable number.

15144081644 is a deficient number, since it is larger than the sum of its proper divisors (13309702036).

15144081644 is a wasteful number, since it uses less digits than its factorization.

15144081644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818 (or 3816 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The spelling of 15144081644 in words is "fifteen billion, one hundred forty-four million, eighty-one thousand, six hundred forty-four".