61772768 has 24 divisors (see below), whose sum is σ = 124446168. Its totient is φ = 30167424.

The previous prime is 61772761. The next prime is 61772783. The reversal of 61772768 is 86727716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61772761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21071 + ... + 23822.

It is an arithmetic number, because the mean of its divisors is an integer number (5185257).

Almost surely, 2^61772768 is an apocalyptic number.

It is an amenable number.

61772768 is an abundant number, since it is smaller than the sum of its proper divisors (62673400).

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

61772768 is a wasteful number, since it uses less digits than its factorization.

61772768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44946 (or 44938 counting only the distinct ones).

The product of its digits is 197568, while the sum is 44.

The square root of 61772768 is about 7859.5653823860. The cubic root of 61772768 is about 395.3050423679.

The spelling of 61772768 in words is "sixty-one million, seven hundred seventy-two thousand, seven hundred sixty-eight".