15500408649 has 8 divisors (see below), whose sum is σ = 22546048992. Its totient is φ = 9394187040.

The previous prime is 15500408641. The next prime is 15500408659. The reversal of 15500408649 is 94680400551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15500408649 - 2³ = 15500408641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15500408649.

It is not an unprimeable number, because it can be changed into a prime (15500408641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234854644 + ... + 234854709.

It is an arithmetic number, because the mean of its divisors is an integer number (2818256124).

Almost surely, 2^15500408649 is an apocalyptic number.

It is an amenable number.

15500408649 is a deficient number, since it is larger than the sum of its proper divisors (7045640343).

15500408649 is a wasteful number, since it uses less digits than its factorization.

15500408649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469709367.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 15500408649 in words is "fifteen billion, five hundred million, four hundred eight thousand, six hundred forty-nine".