618831608856377 has 6 divisors (see below), whose sum is σ = 719865340914618. Its totient is φ = 530427093305424.

The previous prime is 618831608856359. The next prime is 618831608856403. The reversal of 618831608856377 is 773658806138816.

It can be written as a sum of positive squares in only one way, i.e., 400505599668496 + 218326009187881 = 20012636^2 + 14775859^2 .

It is not a de Polignac number, because 618831608856377 - 2¹⁸ = 618831608594233 is a prime.

It is a super-2 number, since 2×618831608856377² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 618831608856298 and 618831608856307.

It is not an unprimeable number, because it can be changed into a prime (618831608856077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6314608253588 + ... + 6314608253685.

It is an arithmetic number, because the mean of its divisors is an integer number (119977556819103).

Almost surely, 2^{618831608856377} is an apocalyptic number.

It is an amenable number.

618831608856377 is a deficient number, since it is larger than the sum of its proper divisors (101033732058241).

618831608856377 is a wasteful number, since it uses less digits than its factorization.

618831608856377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12629216507287 (or 12629216507280 counting only the distinct ones).

The product of its (nonzero) digits is 1950842880, while the sum is 77.

The spelling of 618831608856377 in words is "six hundred eighteen trillion, eight hundred thirty-one billion, six hundred eight million, eight hundred fifty-six thousand, three hundred seventy-seven".