15616061580 has 192 divisors, whose sum is σ = 50660628480. Its totient is φ = 3520475136.

The previous prime is 15616061579. The next prime is 15616061581. The reversal of 15616061580 is 8516061651.

It is an interprime number because it is at equal distance from previous prime (15616061579) and next prime (15616061581).

It is a super-2 number, since 2×15616061580² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15616061581) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12039492 + ... + 12040788.

It is an arithmetic number, because the mean of its divisors is an integer number (263857440).

Almost surely, 2^15616061580 is an apocalyptic number.

15616061580 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 15616061580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25330314240).

15616061580 is an abundant number, since it is smaller than the sum of its proper divisors (35044566900).

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

15616061580 is a wasteful number, since it uses less digits than its factorization.

15616061580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688 (or 1686 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 15616061580 in words is "fifteen billion, six hundred sixteen million, sixty-one thousand, five hundred eighty".