15949224720 has 960 divisors, whose sum is σ = 68635607040. Its totient is φ = 3259699200.

The previous prime is 15949224703. The next prime is 15949224727. The reversal of 15949224720 is 2742294951.

15949224720 is a `hidden beast` number, since 1 + 5 + 94 + 92 + 2 + 472 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (15949224727) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 60643309 + ... + 60643571.

It is an arithmetic number, because the mean of its divisors is an integer number (71495424).

Almost surely, 2^15949224720 is an apocalyptic number.

15949224720 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 15949224720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34317803520).

15949224720 is an abundant number, since it is smaller than the sum of its proper divisors (52686382320).

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

15949224720 is a wasteful number, since it uses less digits than its factorization.

15949224720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 15949224720 in words is "fifteen billion, nine hundred forty-nine million, two hundred twenty-four thousand, seven hundred twenty".