61807056 has 80 divisors (see below), whose sum is σ = 167370240. Its totient is φ = 19630080.

The previous prime is 61807037. The next prime is 61807061. The reversal of 61807056 is 65070816.

It is a super-2 number, since 2×61807056² = 7640224342774272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108340 + ... + 108908.

It is an arithmetic number, because the mean of its divisors is an integer number (2092128).

Almost surely, 2^61807056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61807056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83685120).

61807056 is an abundant number, since it is smaller than the sum of its proper divisors (105563184).

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

61807056 is a wasteful number, since it uses less digits than its factorization.

61807056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 61807056 is about 7861.7463708771. The cubic root of 61807056 is about 395.3781690475.

The spelling of 61807056 in words is "sixty-one million, eight hundred seven thousand, fifty-six".