15800720530 has 32 divisors (see below), whose sum is σ = 34215096960. Its totient is φ = 5132263680.

The previous prime is 15800720519. The next prime is 15800720543. The reversal of 15800720530 is 3502700851.

It is a junction number, because it is equal to n+sod(n) for n = 15800720492 and 15800720501.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5938791 + ... + 5941450.

It is an arithmetic number, because the mean of its divisors is an integer number (1069221780).

Almost surely, 2^15800720530 is an apocalyptic number.

15800720530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15800720530 is an abundant number, since it is smaller than the sum of its proper divisors (18414376430).

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

15800720530 is a wasteful number, since it uses less digits than its factorization.

15800720530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11880274.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 15800720530 in words is "fifteen billion, eight hundred million, seven hundred twenty thousand, five hundred thirty".