618451679999 has 16 divisors (see below), whose sum is σ = 654324300000. Its totient is φ = 582918819840.

The previous prime is 618451679981. The next prime is 618451680023. The reversal of 618451679999 is 999976154816.

It is a cyclic number.

It is not a de Polignac number, because 618451679999 - 2²⁰ = 618450631423 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 (618451679939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2873459 + ... + 3081179.

It is an arithmetic number, because the mean of its divisors is an integer number (40895268750).

Almost surely, 2^618451679999 is an apocalyptic number.

618451679999 is a deficient number, since it is larger than the sum of its proper divisors (35872620001).

618451679999 is a wasteful number, since it uses less digits than its factorization.

618451679999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208538.

The product of its digits is 264539520, while the sum is 74.

The spelling of 618451679999 in words is "six hundred eighteen billion, four hundred fifty-one million, six hundred seventy-nine thousand, nine hundred ninety-nine".