15899421120 has 224 divisors, whose sum is σ = 55184405760. Its totient is φ = 3846389760.

The previous prime is 15899421107. The next prime is 15899421133. The reversal of 15899421120 is 2112499851.

It is an interprime number because it is at equal distance from previous prime (15899421107) and next prime (15899421133).

It is a super-2 number, since 2×15899421120² (a number of 21 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 6260811 + ... + 6263349.

Almost surely, 2^15899421120 is an apocalyptic number.

15899421120 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 15899421120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27592202880).

15899421120 is an abundant number, since it is smaller than the sum of its proper divisors (39284984640).

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

15899421120 is a wasteful number, since it uses less digits than its factorization.

15899421120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163 (or 3153 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 15899421120 in words is "fifteen billion, eight hundred ninety-nine million, four hundred twenty-one thousand, one hundred twenty".