61897675311 has 20 divisors (see below), whose sum is σ = 92471128200. Its totient is φ = 41262127056.

The previous prime is 61897675289. The next prime is 61897675321. The reversal of 61897675311 is 11357679816.

61897675311 is a `hidden beast` number, since 6 + 18 + 97 + 6 + 7 + 531 + 1 = 666.

It is not a de Polignac number, because 61897675311 - 2⁶ = 61897675247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61897675321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2106720 + ... + 2135898.

It is an arithmetic number, because the mean of its divisors is an integer number (4623556410).

Almost surely, 2^61897675311 is an apocalyptic number.

61897675311 is a deficient number, since it is larger than the sum of its proper divisors (30573452889).

61897675311 is a wasteful number, since it uses less digits than its factorization.

61897675311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55380 (or 55371 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The spelling of 61897675311 in words is "sixty-one billion, eight hundred ninety-seven million, six hundred seventy-five thousand, three hundred eleven".