61628618 has 8 divisors (see below), whose sum is σ = 93261348. Its totient is φ = 30541504.

The previous prime is 61628591. The next prime is 61628653. The reversal of 61628618 is 81682616.

It can be written as a sum of positive squares in 2 ways, for example, as 43335889 + 18292729 = 6583^2 + 4277^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136121 + ... + 136572.

Almost surely, 2^61628618 is an apocalyptic number.

61628618 is a deficient number, since it is larger than the sum of its proper divisors (31632730).

61628618 is a wasteful number, since it uses less digits than its factorization.

61628618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272808.

The product of its digits is 27648, while the sum is 38.

The square root of 61628618 is about 7850.3896718571. The cubic root of 61628618 is about 394.9973145147.

The spelling of 61628618 in words is "sixty-one million, six hundred twenty-eight thousand, six hundred eighteen".