15686428464 has 160 divisors (see below), whose sum is σ = 51599792640. Its totient is φ = 4469499648.

The previous prime is 15686428427. The next prime is 15686428469. The reversal of 15686428464 is 46482468651.

15686428464 is a `hidden beast` number, since 156 + 8 + 6 + 4 + 28 + 464 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 15686428464.

It is not an unprimeable number, because it can be changed into a prime (15686428469) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1120999 + ... + 1134905.

It is an arithmetic number, because the mean of its divisors is an integer number (322498704).

Almost surely, 2^15686428464 is an apocalyptic number.

15686428464 is a gapful number since it is divisible by the number (14) 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 15686428464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25799896320).

15686428464 is an abundant number, since it is smaller than the sum of its proper divisors (35913364176).

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

15686428464 is a wasteful number, since it uses less digits than its factorization.

15686428464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14304 (or 14292 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 54.

The spelling of 15686428464 in words is "fifteen billion, six hundred eighty-six million, four hundred twenty-eight thousand, four hundred sixty-four".