15778059660 has 480 divisors, whose sum is σ = 56349216000. Its totient is φ = 3662184960.

The previous prime is 15778059653. The next prime is 15778059679. The reversal of 15778059660 is 6695087751.

15778059660 is a `hidden beast` number, since 1 + 577 + 8 + 0 + 5 + 9 + 6 + 60 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 15778059597 and 15778059606.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 45209166 + ... + 45209514.

It is an arithmetic number, because the mean of its divisors is an integer number (117394200).

Almost surely, 2^15778059660 is an apocalyptic number.

15778059660 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 15778059660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28174608000).

15778059660 is an abundant number, since it is smaller than the sum of its proper divisors (40571156340).

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

15778059660 is a wasteful number, since it uses less digits than its factorization.

15778059660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The spelling of 15778059660 in words is "fifteen billion, seven hundred seventy-eight million, fifty-nine thousand, six hundred sixty".