61018646 has 16 divisors (see below), whose sum is σ = 98700000. Its totient is φ = 28124928.

The previous prime is 61018613. The next prime is 61018663. The reversal of 61018646 is 64681016.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31535 + ... + 33413.

It is an arithmetic number, because the mean of its divisors is an integer number (6168750).

Almost surely, 2^61018646 is an apocalyptic number.

61018646 is a deficient number, since it is larger than the sum of its proper divisors (37681354).

61018646 is a wasteful number, since it uses less digits than its factorization.

61018646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 61018646 is about 7811.4432725329. The cubic root of 61018646 is about 393.6898234736.

The spelling of 61018646 in words is "sixty-one million, eighteen thousand, six hundred forty-six".