618273306832564 has 6 divisors (see below), whose sum is σ = 1081978286956994. Its totient is φ = 309136653416280.

The previous prime is 618273306832553. The next prime is 618273306832613. The reversal of 618273306832564 is 465238603372816.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 616349143904400 + 1924162928164 = 24826380^2 + 1387142^2 .

It is a junction number, because it is equal to n+sod(n) for n = 618273306832496 and 618273306832505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77284163354067 + ... + 77284163354074.

Almost surely, 2^{618273306832564} is an apocalyptic number.

It is an amenable number.

618273306832564 is a deficient number, since it is larger than the sum of its proper divisors (463704980124430).

618273306832564 is a wasteful number, since it uses less digits than its factorization.

618273306832564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154568326708145 (or 154568326708143 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 64.

The spelling of 618273306832564 in words is "six hundred eighteen trillion, two hundred seventy-three billion, three hundred six million, eight hundred thirty-two thousand, five hundred sixty-four".