15061980618 has 240 divisors, whose sum is σ = 37640544480. Its totient is φ = 4494667968.

The previous prime is 15061980611. The next prime is 15061980623. The reversal of 15061980618 is 81608916051.

15061980618 is a `hidden beast` number, since 1 + 506 + 1 + 9 + 80 + 61 + 8 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (15061980611) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 140766121 + ... + 140766227.

It is an arithmetic number, because the mean of its divisors is an integer number (156835602).

Almost surely, 2^15061980618 is an apocalyptic number.

15061980618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15061980618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18820272240).

15061980618 is an abundant number, since it is smaller than the sum of its proper divisors (22578563862).

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

15061980618 is a wasteful number, since it uses less digits than its factorization.

15061980618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 15061980618 in words is "fifteen billion, sixty-one million, nine hundred eighty thousand, six hundred eighteen".