116643641 has 4 divisors (see below), whose sum is σ = 122782800. Its totient is φ = 110504484.

The previous prime is 116643629. The next prime is 116643643. The reversal of 116643641 is 146346611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146346611 = 449 ⋅325939.

It is a cyclic number.

It is not a de Polignac number, because 116643641 - 2⁶ = 116643577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 116643598 and 116643607.

It is not an unprimeable number, because it can be changed into a prime (116643643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3069551 + ... + 3069588.

It is an arithmetic number, because the mean of its divisors is an integer number (30695700).

Almost surely, 2^116643641 is an apocalyptic number.

It is an amenable number.

116643641 is a deficient number, since it is larger than the sum of its proper divisors (6139159).

116643641 is an equidigital number, since it uses as much as digits as its factorization.

116643641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6139158.

The product of its digits is 10368, while the sum is 32.

The square root of 116643641 is about 10800.1685634994. The cubic root of 116643641 is about 488.6002548820.

The spelling of 116643641 in words is "one hundred sixteen million, six hundred forty-three thousand, six hundred forty-one".