61612818 has 16 divisors (see below), whose sum is σ = 125551296. Its totient is φ = 20150000.

The previous prime is 61612787. The next prime is 61612823. The reversal of 61612818 is 81821616.

It is a super-2 number, since 2×61612818² = 7592278683802248, which contains 22 as substring.

It is a Curzon 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, 96558 + ... + 97193.

It is an arithmetic number, because the mean of its divisors is an integer number (7846956).

Almost surely, 2^61612818 is an apocalyptic number.

61612818 is an abundant number, since it is smaller than the sum of its proper divisors (63938478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61612818 is a wasteful number, since it uses less digits than its factorization.

61612818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193809.

The product of its digits is 4608, while the sum is 33.

The square root of 61612818 is about 7849.3832878768. The cubic root of 61612818 is about 394.9635558963.

The spelling of 61612818 in words is "sixty-one million, six hundred twelve thousand, eight hundred eighteen".