61617764 has 12 divisors (see below), whose sum is σ = 116125884. Its totient is φ = 28438944.

The previous prime is 61617761. The next prime is 61617791. The reversal of 61617764 is 46771616.

61617764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4494400 + 57123364 = 2120^2 + 7558^2 .

It is not an unprimeable number, because it can be changed into a prime (61617761) 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 3 ways as a sum of consecutive naturals, for example, 592427 + ... + 592530.

It is an arithmetic number, because the mean of its divisors is an integer number (9677157).

Almost surely, 2^61617764 is an apocalyptic number.

It is an amenable number.

61617764 is a deficient number, since it is larger than the sum of its proper divisors (54508120).

61617764 is a wasteful number, since it uses less digits than its factorization.

61617764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184974 (or 1184972 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 61617764 is about 7849.6983381529. The cubic root of 61617764 is about 394.9741242463.

The spelling of 61617764 in words is "sixty-one million, six hundred seventeen thousand, seven hundred sixty-four".