116561557 has 8 divisors (see below), whose sum is σ = 133370496. Its totient is φ = 99791952.

The previous prime is 116561531. The next prime is 116561567. The reversal of 116561557 is 755165611.

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

It is a cyclic number.

It is not a de Polignac number, because 116561557 - 2¹⁹ = 116037269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116561567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3178 + ... + 15595.

It is an arithmetic number, because the mean of its divisors is an integer number (16671312).

Almost surely, 2^116561557 is an apocalyptic number.

It is an amenable number.

116561557 is a deficient number, since it is larger than the sum of its proper divisors (16808939).

116561557 is an equidigital number, since it uses as much as digits as its factorization.

116561557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19667.

The product of its digits is 31500, while the sum is 37.

The square root of 116561557 is about 10796.3677688378. The cubic root of 116561557 is about 488.4856160428.

It can be divided in two parts, 11 and 6561557, that multiplied together give a palindrome (72177127).

The spelling of 116561557 in words is "one hundred sixteen million, five hundred sixty-one thousand, five hundred fifty-seven".