61577776 has 20 divisors (see below), whose sum is σ = 128484832. Its totient is φ = 28420416.

The previous prime is 61577773. The next prime is 61577779. The reversal of 61577776 is 67777516.

61577776 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61577773) and next prime (61577779).

It is not an unprimeable number, because it can be changed into a prime (61577773) 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, 147816 + ... + 148231.

Almost surely, 2^61577776 is an apocalyptic number.

It is an amenable number.

61577776 is an abundant number, since it is smaller than the sum of its proper divisors (66907056).

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

61577776 is a wasteful number, since it uses less digits than its factorization.

61577776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296068 (or 296062 counting only the distinct ones).

The product of its digits is 432180, while the sum is 46.

The square root of 61577776 is about 7847.1508205208. The cubic root of 61577776 is about 394.8886638090. Note that the first 3 decimals are identical.

The spelling of 61577776 in words is "sixty-one million, five hundred seventy-seven thousand, seven hundred seventy-six".