61599912 has 64 divisors (see below), whose sum is σ = 168730560. Its totient is φ = 18585600.

The previous prime is 61599907. The next prime is 61599949. The reversal of 61599912 is 21999516.

It is a happy 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, 92862 + ... + 93522.

It is an arithmetic number, because the mean of its divisors is an integer number (2636415).

Almost surely, 2^61599912 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 61599912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84365280).

61599912 is an abundant number, since it is smaller than the sum of its proper divisors (107130648).

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

61599912 is a wasteful number, since it uses less digits than its factorization.

61599912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1030 counting only the distinct ones).

The product of its digits is 43740, while the sum is 42.

The square root of 61599912 is about 7848.5611420183. The cubic root of 61599912 is about 394.9359763775.

The spelling of 61599912 in words is "sixty-one million, five hundred ninety-nine thousand, nine hundred twelve".