61918844 has 24 divisors (see below), whose sum is σ = 117035520. Its totient is φ = 28494144.

The previous prime is 61918841. The next prime is 61918847. The reversal of 61918844 is 44881916.

It is an interprime number because it is at equal distance from previous prime (61918841) and next prime (61918847).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61918841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18362 + ... + 21470.

It is an arithmetic number, because the mean of its divisors is an integer number (4876480).

Almost surely, 2^61918844 is an apocalyptic number.

It is an amenable number.

61918844 is a deficient number, since it is larger than the sum of its proper divisors (55116676).

61918844 is a wasteful number, since it uses less digits than its factorization.

61918844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509 (or 3507 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 61918844 is about 7868.8527753415. The cubic root of 61918844 is about 395.6163938158.

It can be divided in two parts, 619188 and 44, that multiplied together give a palindrome (27244272).

The spelling of 61918844 in words is "sixty-one million, nine hundred eighteen thousand, eight hundred forty-four".