616918146120891 has 24 divisors (see below), whose sum is σ = 895324274526864. Its totient is φ = 409332133108800.

The previous prime is 616918146120833. The next prime is 616918146120929. The reversal of 616918146120891 is 198021641819616.

616918146120891 is a `hidden beast` number, since 6 + 1 + 6 + 9 + 1 + 8 + 1 + 4 + 612 + 0 + 8 + 9 + 1 = 666.

It is not a de Polignac number, because 616918146120891 - 2⁹ = 616918146120379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616918146120821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43510060 + ... + 55919241.

It is an arithmetic number, because the mean of its divisors is an integer number (37305178105286).

Almost surely, 2^{616918146120891} is an apocalyptic number.

616918146120891 is a deficient number, since it is larger than the sum of its proper divisors (278406128405973).

616918146120891 is a wasteful number, since it uses less digits than its factorization.

616918146120891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99432571 (or 99432568 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 63.

The spelling of 616918146120891 in words is "six hundred sixteen trillion, nine hundred eighteen billion, one hundred forty-six million, one hundred twenty thousand, eight hundred ninety-one".