15451942320 has 220 divisors, whose sum is σ = 53904819216. Its totient is φ = 4119258240.

The previous prime is 15451942267. The next prime is 15451942321. The reversal of 15451942320 is 2324915451.

15451942320 is a `hidden beast` number, since 1 + 545 + 1 + 94 + 2 + 3 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (15451942321) by changing a digit.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 4722285 + ... + 4725555.

Almost surely, 2^15451942320 is an apocalyptic number.

15451942320 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 15451942320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26952409608).

15451942320 is an abundant number, since it is smaller than the sum of its proper divisors (38452876896).

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

15451942320 is an frugal number, since it uses more digits than its factorization.

15451942320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314 (or 3281 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 15451942320 in words is "fifteen billion, four hundred fifty-one million, nine hundred forty-two thousand, three hundred twenty".