61644180077756 has 12 divisors (see below), whose sum is σ = 114223039555968. Its totient is φ = 29009025918912.

The previous prime is 61644180077747. The next prime is 61644180077761. The reversal of 61644180077756 is 65777008144616.

61644180077756 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453266029916 + ... + 453266030051.

It is an arithmetic number, because the mean of its divisors is an integer number (9518586629664).

Almost surely, 2^{61644180077756} is an apocalyptic number.

It is an amenable number.

61644180077756 is a deficient number, since it is larger than the sum of its proper divisors (52578859478212).

61644180077756 is a wasteful number, since it uses less digits than its factorization.

61644180077756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906532059988 (or 906532059986 counting only the distinct ones).

The product of its (nonzero) digits is 47416320, while the sum is 62.

The spelling of 61644180077756 in words is "sixty-one trillion, six hundred forty-four billion, one hundred eighty million, seventy-seven thousand, seven hundred fifty-six".