61605912 has 64 divisors (see below), whose sum is σ = 158256000. Its totient is φ = 19977984.

The previous prime is 61605911. The next prime is 61605949. The reversal of 61605912 is 21950616.

It is a self number, because there is not a number n which added to its sum of digits gives 61605912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61605911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196668 + ... + 196980.

It is an arithmetic number, because the mean of its divisors is an integer number (2472750).

Almost surely, 2^61605912 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 61605912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79128000).

61605912 is an abundant number, since it is smaller than the sum of its proper divisors (96650088).

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

61605912 is a wasteful number, since it uses less digits than its factorization.

61605912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 61605912 is about 7848.9433683777. The cubic root of 61605912 is about 394.9487985762.

The spelling of 61605912 in words is "sixty-one million, six hundred five thousand, nine hundred twelve".