61777277716 has 48 divisors (see below), whose sum is σ = 134881810560. Its totient is φ = 24052101120.

The previous prime is 61777277701. The next prime is 61777277761.

61777277716 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371380 + ... + 511348.

It is an arithmetic number, because the mean of its divisors is an integer number (2810037720).

Almost surely, 2^61777277716 is an apocalyptic number.

It is an amenable number.

61777277716 is an abundant number, since it is smaller than the sum of its proper divisors (73104532844).

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

61777277716 is a wasteful number, since it uses less digits than its factorization.

61777277716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141424 (or 141422 counting only the distinct ones).

The product of its digits is 8470728, while the sum is 58.

The spelling of 61777277716 in words is "sixty-one billion, seven hundred seventy-seven million, two hundred seventy-seven thousand, seven hundred sixteen".