116451561 has 16 divisors (see below), whose sum is σ = 158013504. Its totient is φ = 76268544.

The previous prime is 116451539. The next prime is 116451637. The reversal of 116451561 is 165154611.

It is not a de Polignac number, because 116451561 - 2⁵ = 116451529 is a prime.

It is a super-3 number, since 3×116451561³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (116451661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118705 + ... + 119681.

It is an arithmetic number, because the mean of its divisors is an integer number (9875844).

Almost surely, 2^116451561 is an apocalyptic number.

It is an amenable number.

116451561 is a deficient number, since it is larger than the sum of its proper divisors (41561943).

116451561 is an equidigital number, since it uses as much as digits as its factorization.

116451561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640.

The product of its digits is 3600, while the sum is 30.

The square root of 116451561 is about 10791.2724458240. The cubic root of 116451561 is about 488.3319107798.

It can be divided in two parts, 1164 and 51561, that added together give a palindrome (52725).

The spelling of 116451561 in words is "one hundred sixteen million, four hundred fifty-one thousand, five hundred sixty-one".