618681658 has 16 divisors (see below), whose sum is σ = 1063056960. Its totient is φ = 264534336.

The previous prime is 618681653. The next prime is 618681671. The reversal of 618681658 is 856186816.

It is not an unprimeable number, because it can be changed into a prime (618681653) 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 in 7 ways as a sum of consecutive naturals, for example, 44968 + ... + 57091.

It is an arithmetic number, because the mean of its divisors is an integer number (66441060).

Almost surely, 2^618681658 is an apocalyptic number.

618681658 is a deficient number, since it is larger than the sum of its proper divisors (444375302).

618681658 is a wasteful number, since it uses less digits than its factorization.

618681658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102501.

The product of its digits is 552960, while the sum is 49.

The square root of 618681658 is about 24873.3121638434. The cubic root of 618681658 is about 852.0970862570.

It can be divided in two parts, 618 and 681658, that added together give a square (682276 = 826²).

The spelling of 618681658 in words is "six hundred eighteen million, six hundred eighty-one thousand, six hundred fifty-eight".