16561236410 has 16 divisors (see below), whose sum is σ = 29915567136. Its totient is φ = 6601085328.

The previous prime is 16561236401. The next prime is 16561236431. The reversal of 16561236410 is 1463216561.

16561236410 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2923184 + ... + 2928843.

It is an arithmetic number, because the mean of its divisors is an integer number (1869722946).

Almost surely, 2^16561236410 is an apocalyptic number.

16561236410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16561236410 is a deficient number, since it is larger than the sum of its proper divisors (13354330726).

16561236410 is a wasteful number, since it uses less digits than its factorization.

16561236410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5852317.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 16561236410 in words is "sixteen billion, five hundred sixty-one million, two hundred thirty-six thousand, four hundred ten".