61500656 has 80 divisors (see below), whose sum is σ = 142490880. Its totient is φ = 25167360.

The previous prime is 61500629. The next prime is 61500661. The reversal of 61500656 is 65600516.

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, 270815 + ... + 271041.

It is an arithmetic number, because the mean of its divisors is an integer number (1781136).

Almost surely, 2^61500656 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 61500656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71245440).

61500656 is an abundant number, since it is smaller than the sum of its proper divisors (80990224).

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

61500656 is a wasteful number, since it uses less digits than its factorization.

61500656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 61500656 is about 7842.2353955999. The cubic root of 61500656 is about 394.7237421006.

The spelling of 61500656 in words is "sixty-one million, five hundred thousand, six hundred fifty-six".