618816692101 has 8 divisors (see below), whose sum is σ = 622854730584. Its totient is φ = 614779875840.

The previous prime is 618816692093. The next prime is 618816692111. The reversal of 618816692101 is 101296618816.

It can be written as a sum of positive squares in 4 ways, for example, as 138912744100 + 479903948001 = 372710^2 + 692751^2 .

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 618816692101 - 2³ = 618816692093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618816692111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721581 + ... + 1326013.

It is an arithmetic number, because the mean of its divisors is an integer number (77856841323).

Almost surely, 2^618816692101 is an apocalyptic number.

It is an amenable number.

618816692101 is a deficient number, since it is larger than the sum of its proper divisors (4038038483).

618816692101 is a wasteful number, since it uses less digits than its factorization.

618816692101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611111.

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 618816692101 in words is "six hundred eighteen billion, eight hundred sixteen million, six hundred ninety-two thousand, one hundred one".