61061868 has 36 divisors (see below), whose sum is σ = 176401680. Its totient is φ = 17446176.

The previous prime is 61061867. The next prime is 61061881. The reversal of 61061868 is 86816016.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (61061867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120903 + ... + 121406.

Almost surely, 2^61061868 is an apocalyptic number.

It is an amenable number.

61061868 is an abundant number, since it is smaller than the sum of its proper divisors (115339812).

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

61061868 is a wasteful number, since it uses less digits than its factorization.

61061868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242326 (or 242321 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 61061868 is about 7814.2093649966. The cubic root of 61061868 is about 393.7827570631.

The spelling of 61061868 in words is "sixty-one million, sixty-one thousand, eight hundred sixty-eight".