61544688 has 80 divisors (see below), whose sum is σ = 167774976. Its totient is φ = 19402240.

The previous prime is 61544687. The next prime is 61544689. The reversal of 61544688 is 88644516.

61544688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61544687) and next prime (61544689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61544687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117868 + ... + 118388.

Almost surely, 2^61544688 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 61544688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83887488).

61544688 is an abundant number, since it is smaller than the sum of its proper divisors (106230288).

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

61544688 is a wasteful number, since it uses less digits than its factorization.

61544688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 656 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 61544688 is about 7845.0422561003. The cubic root of 61544688 is about 394.8179217440.

The spelling of 61544688 in words is "sixty-one million, five hundred forty-four thousand, six hundred eighty-eight".