618496851438 has 40 divisors (see below), whose sum is σ = 1409380794360. Its totient is φ = 202671281520.

The previous prime is 618496851437. The next prime is 618496851443. The reversal of 618496851438 is 834158694816.

618496851438 is a `hidden beast` number, since 6 + 1 + 84 + 9 + 6 + 8 + 514 + 38 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618496851437) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32345373 + ... + 32364488.

It is an arithmetic number, because the mean of its divisors is an integer number (35234519859).

Almost surely, 2^618496851438 is an apocalyptic number.

618496851438 is an abundant number, since it is smaller than the sum of its proper divisors (790883942922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618496851438 is a wasteful number, since it uses less digits than its factorization.

618496851438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64709934 (or 64709925 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The spelling of 618496851438 in words is "six hundred eighteen billion, four hundred ninety-six million, eight hundred fifty-one thousand, four hundred thirty-eight".