61697650277 has 16 divisors (see below), whose sum is σ = 63352627200. Its totient is φ = 60062496000.

The previous prime is 61697650271. The next prime is 61697650309. The reversal of 61697650277 is 77205679616.

It is a cyclic number.

It is not a de Polignac number, because 61697650277 - 2³⁰ = 60623908453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61697650271) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4051724 + ... + 4066922.

It is an arithmetic number, because the mean of its divisors is an integer number (3959539200).

Almost surely, 2^61697650277 is an apocalyptic number.

It is an amenable number.

61697650277 is a deficient number, since it is larger than the sum of its proper divisors (1654976923).

61697650277 is a wasteful number, since it uses less digits than its factorization.

61697650277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15844.

The product of its (nonzero) digits is 6667920, while the sum is 56.

The spelling of 61697650277 in words is "sixty-one billion, six hundred ninety-seven million, six hundred fifty thousand, two hundred seventy-seven".