618696671485 has 8 divisors (see below), whose sum is σ = 754607088216. Its totient is φ = 486843282240.

The previous prime is 618696671473. The next prime is 618696671521. The reversal of 618696671485 is 584176696816.

It can be written as a sum of positive squares in 4 ways, for example, as 7565172484 + 611131499001 = 86978^2 + 781749^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-618696671485 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 618696671485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1014256534 + ... + 1014257143.

It is an arithmetic number, because the mean of its divisors is an integer number (94325886027).

Almost surely, 2^618696671485 is an apocalyptic number.

It is an amenable number.

618696671485 is a deficient number, since it is larger than the sum of its proper divisors (135910416731).

618696671485 is a wasteful number, since it uses less digits than its factorization.

618696671485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028513743.

The product of its digits is 104509440, while the sum is 67.

The spelling of 618696671485 in words is "six hundred eighteen billion, six hundred ninety-six million, six hundred seventy-one thousand, four hundred eighty-five".