618451143691 has 16 divisors (see below), whose sum is σ = 634873371264. Its totient is φ = 602122840704.

The previous prime is 618451143677. The next prime is 618451143767. The reversal of 618451143691 is 196341154816.

It is a cyclic number.

It is not a de Polignac number, because 618451143691 - 2⁹ = 618451143179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618451144691) 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 15 ways as a sum of consecutive naturals, for example, 62320056 + ... + 62329978.

It is an arithmetic number, because the mean of its divisors is an integer number (39679585704).

Almost surely, 2^618451143691 is an apocalyptic number.

618451143691 is a deficient number, since it is larger than the sum of its proper divisors (16422227573).

618451143691 is a wasteful number, since it uses less digits than its factorization.

618451143691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14490.

The product of its digits is 622080, while the sum is 49.

The spelling of 618451143691 in words is "six hundred eighteen billion, four hundred fifty-one million, one hundred forty-three thousand, six hundred ninety-one".