15801242000 has 160 divisors (see below), whose sum is σ = 38900010240. Its totient is φ = 6207129600.

The previous prime is 15801241997. The next prime is 15801242057. The reversal of 15801242000 is 24210851.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31413749 + ... + 31414251.

It is an arithmetic number, because the mean of its divisors is an integer number (243125064).

Almost surely, 2^15801242000 is an apocalyptic number.

15801242000 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 15801242000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19450005120).

15801242000 is an abundant number, since it is smaller than the sum of its proper divisors (23098768240).

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

15801242000 is a wasteful number, since it uses less digits than its factorization.

15801242000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 15801242000 its reverse (24210851), we get a palindrome (15825452851).

The spelling of 15801242000 in words is "fifteen billion, eight hundred one million, two hundred forty-two thousand".