61865622 has 96 divisors (see below), whose sum is σ = 166682880. Its totient is φ = 16148160.

The previous prime is 61865621. The next prime is 61865623. The reversal of 61865622 is 22656816.

It is an interprime number because it is at equal distance from previous prime (61865621) and next prime (61865623).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61865621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 293097 + ... + 293307.

It is an arithmetic number, because the mean of its divisors is an integer number (1736280).

Almost surely, 2^61865622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61865622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83341440).

61865622 is an abundant number, since it is smaller than the sum of its proper divisors (104817258).

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

61865622 is a wasteful number, since it uses less digits than its factorization.

61865622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 415 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 61865622 is about 7865.4702338767. The cubic root of 61865622 is about 395.5030113625.

The spelling of 61865622 in words is "sixty-one million, eight hundred sixty-five thousand, six hundred twenty-two".