15649673280 has 112 divisors (see below), whose sum is σ = 49786885440. Its totient is φ = 4164917248.

The previous prime is 15649673257. The next prime is 15649673287. The reversal of 15649673280 is 8237694651.

It is not an unprimeable number, because it can be changed into a prime (15649673287) 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, 472627 + ... + 504653.

It is a 1-persistent number, because it is pandigital, but 2⋅15649673280 = 31299346560 is not.

Almost surely, 2^15649673280 is an apocalyptic number.

15649673280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15649673280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24893442720).

15649673280 is an abundant number, since it is smaller than the sum of its proper divisors (34137212160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15649673280 is a wasteful number, since it uses less digits than its factorization.

15649673280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32556 (or 32546 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 15649673280 in words is "fifteen billion, six hundred forty-nine million, six hundred seventy-three thousand, two hundred eighty".