15798863808 has 672 divisors, whose sum is σ = 60191416320. Its totient is φ = 4023613440.

The previous prime is 15798863797. The next prime is 15798863819. The reversal of 15798863808 is 80836889751.

It is an interprime number because it is at equal distance from previous prime (15798863797) and next prime (15798863819).

It is a tau number, because it is divible by the number of its divisors (672).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34122585 + ... + 34123047.

It is an arithmetic number, because the mean of its divisors is an integer number (89570560).

Almost surely, 2^15798863808 is an apocalyptic number.

15798863808 is a gapful number since it is divisible by the number (18) 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 15798863808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30095708160).

15798863808 is an abundant number, since it is smaller than the sum of its proper divisors (44392552512).

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

15798863808 is a wasteful number, since it uses less digits than its factorization.

15798863808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 63.

The spelling of 15798863808 in words is "fifteen billion, seven hundred ninety-eight million, eight hundred sixty-three thousand, eight hundred eight".