618861476 has 6 divisors (see below), whose sum is σ = 1083007590. Its totient is φ = 309430736.

The previous prime is 618861473. The next prime is 618861487. The reversal of 618861476 is 674168816.

It can be written as a sum of positive squares in only one way, i.e., 417221476 + 201640000 = 20426^2 + 14200^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 618861476.

It is not an unprimeable number, because it can be changed into a prime (618861473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77357681 + ... + 77357688.

It is an arithmetic number, because the mean of its divisors is an integer number (180501265).

Almost surely, 2^618861476 is an apocalyptic number.

It is an amenable number.

618861476 is a deficient number, since it is larger than the sum of its proper divisors (464146114).

618861476 is a wasteful number, since it uses less digits than its factorization.

618861476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154715373 (or 154715371 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 618861476 is about 24876.9265786592. The cubic root of 618861476 is about 852.1796314290.

The spelling of 618861476 in words is "six hundred eighteen million, eight hundred sixty-one thousand, four hundred seventy-six".