15660615561048 has 24 divisors (see below), whose sum is σ = 42414167144700. Its totient is φ = 5220205186992.

The previous prime is 15660615561001. The next prime is 15660615561049. The reversal of 15660615561048 is 84016551606651.

It is a happy number.

15660615561048 is a `hidden beast` number, since 1 + 5 + 6 + 6 + 0 + 6 + 15 + 5 + 610 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 15660615560985 and 15660615561003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15660615561049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108754274658 + ... + 108754274801.

Almost surely, 2^{15660615561048} is an apocalyptic number.

15660615561048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15660615561048 is an abundant number, since it is smaller than the sum of its proper divisors (26753551583652).

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

15660615561048 is a wasteful number, since it uses less digits than its factorization.

15660615561048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217508549471 (or 217508549464 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 54.

The spelling of 15660615561048 in words is "fifteen trillion, six hundred sixty billion, six hundred fifteen million, five hundred sixty-one thousand, forty-eight".