5918909216661 has 24 divisors (see below), whose sum is σ = 10285155533120. Its totient is φ = 3204221530176.

The previous prime is 5918909216639. The next prime is 5918909216761. The reversal of 5918909216661 is 1666129098195.

It is not a de Polignac number, because 5918909216661 - 2³⁴ = 5901729347477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5918909216611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2472391960 + ... + 2472394353.

Almost surely, 2^{5918909216661} is an apocalyptic number.

It is an amenable number.

5918909216661 is a deficient number, since it is larger than the sum of its proper divisors (4366246316459).

5918909216661 is a wasteful number, since it uses less digits than its factorization.

5918909216661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944786345 (or 4944786342 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 63.

The spelling of 5918909216661 in words is "five trillion, nine hundred eighteen billion, nine hundred nine million, two hundred sixteen thousand, six hundred sixty-one".