15560313728778 has 384 divisors, whose sum is σ = 44321235678720. Its totient is φ = 3830689013760.

The previous prime is 15560313728767. The next prime is 15560313728779. The reversal of 15560313728778 is 87782731306551.

15560313728778 is a `hidden beast` number, since 1 + 5 + 5 + 603 + 13 + 7 + 2 + 8 + 7 + 7 + 8 = 666.

It is a super-2 number, since 2×15560313728778² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (15560313728779) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2710380988 + ... + 2710386728.

It is an arithmetic number, because the mean of its divisors is an integer number (115419884580).

Almost surely, 2^{15560313728778} is an apocalyptic number.

15560313728778 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 15560313728778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22160617839360).

15560313728778 is an abundant number, since it is smaller than the sum of its proper divisors (28760921949942).

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

15560313728778 is a wasteful number, since it uses less digits than its factorization.

15560313728778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054 (or 7051 counting only the distinct ones).

The product of its (nonzero) digits is 59270400, while the sum is 63.

The spelling of 15560313728778 in words is "fifteen trillion, five hundred sixty billion, three hundred thirteen million, seven hundred twenty-eight thousand, seven hundred seventy-eight".