61774668216 has 96 divisors (see below), whose sum is σ = 168341846400. Its totient is φ = 20464488000.

The previous prime is 61774668209. The next prime is 61774668227. The reversal of 61774668216 is 61286647716.

61774668216 is a `hidden beast` number, since 6 + 177 + 466 + 8 + 2 + 1 + 6 = 666.

It is a super-2 number, since 2×61774668216² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8797555 + ... + 8804573.

It is an arithmetic number, because the mean of its divisors is an integer number (1753560900).

Almost surely, 2^61774668216 is an apocalyptic number.

It is an amenable number.

61774668216 is an abundant number, since it is smaller than the sum of its proper divisors (106567178184).

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

61774668216 is a wasteful number, since it uses less digits than its factorization.

61774668216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7769 (or 7762 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The spelling of 61774668216 in words is "sixty-one billion, seven hundred seventy-four million, six hundred sixty-eight thousand, two hundred sixteen".