620461618 has 20 divisors (see below), whose sum is σ = 1085751630. Its totient is φ = 265910064.

The previous prime is 620461609. The next prime is 620461627. The reversal of 620461618 is 816164026.

It is an interprime number because it is at equal distance from previous prime (620461609) and next prime (620461627).

It can be written as a sum of positive squares in only one way, i.e., 617174649 + 3286969 = 24843^2 + 1813^2 .

It is a super-2 number, since 2×620461618² = 769945238822355848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 59803 + ... + 69406.

Almost surely, 2^620461618 is an apocalyptic number.

620461618 is a deficient number, since it is larger than the sum of its proper divisors (465290012).

620461618 is an equidigital number, since it uses as much as digits as its factorization.

620461618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129239 (or 129218 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 620461618 is about 24909.0669837310. The cubic root of 620461618 is about 852.9134708526.

The spelling of 620461618 in words is "six hundred twenty million, four hundred sixty-one thousand, six hundred eighteen".