16561725430 has 8 divisors (see below), whose sum is σ = 29811105792. Its totient is φ = 6624690168.

The previous prime is 16561725419. The next prime is 16561725553. The reversal of 16561725430 is 3452716561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828086262 + ... + 828086281.

It is an arithmetic number, because the mean of its divisors is an integer number (3726388224).

Almost surely, 2^16561725430 is an apocalyptic number.

16561725430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16561725430 is a deficient number, since it is larger than the sum of its proper divisors (13249380362).

16561725430 is a wasteful number, since it uses less digits than its factorization.

16561725430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656172550.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 16561725430 in words is "sixteen billion, five hundred sixty-one million, seven hundred twenty-five thousand, four hundred thirty".