15810244992 has 48 divisors (see below), whose sum is σ = 45495630180. Its totient is φ = 5270081280.

The previous prime is 15810244951. The next prime is 15810244999. The reversal of 15810244992 is 29944201851.

It is a happy number.

15810244992 is a `hidden beast` number, since 1 + 58 + 102 + 4 + 499 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×15810244992² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15810244999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6860934 + ... + 6863237.

Almost surely, 2^15810244992 is an apocalyptic number.

15810244992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15810244992 is an abundant number, since it is smaller than the sum of its proper divisors (29685385188).

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

15810244992 is a wasteful number, since it uses less digits than its factorization.

15810244992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13724191 (or 13724176 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 15810244992 in words is "fifteen billion, eight hundred ten million, two hundred forty-four thousand, nine hundred ninety-two".