618397967138 has 8 divisors (see below), whose sum is σ = 1060110800832. Its totient is φ = 265027700196.

The previous prime is 618397967107. The next prime is 618397967191. The reversal of 618397967138 is 831769793816.

618397967138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×618397967138² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22085641670 + ... + 22085641697.

It is an arithmetic number, because the mean of its divisors is an integer number (132513850104).

Almost surely, 2^618397967138 is an apocalyptic number.

618397967138 is a deficient number, since it is larger than the sum of its proper divisors (441712833694).

618397967138 is a wasteful number, since it uses less digits than its factorization.

618397967138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44171283376.

The product of its digits is 82301184, while the sum is 68.

The spelling of 618397967138 in words is "six hundred eighteen billion, three hundred ninety-seven million, nine hundred sixty-seven thousand, one hundred thirty-eight".