15947599140 has 432 divisors, whose sum is σ = 56411986176. Its totient is φ = 3777269760.

The previous prime is 15947599133. The next prime is 15947599147. The reversal of 15947599140 is 4199574951.

It is a happy number.

15947599140 is a `hidden beast` number, since 1 + 5 + 9 + 4 + 7 + 599 + 1 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (15947599133) and next prime (15947599147).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (15947599147) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 27638532 + ... + 27639108.

Almost surely, 2^15947599140 is an apocalyptic number.

15947599140 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 15947599140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28205993088).

15947599140 is an abundant number, since it is smaller than the sum of its proper divisors (40464387036).

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

15947599140 is a wasteful number, since it uses less digits than its factorization.

15947599140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 54.

The spelling of 15947599140 in words is "fifteen billion, nine hundred forty-seven million, five hundred ninety-nine thousand, one hundred forty".