61707982045 has 4 divisors (see below), whose sum is σ = 74049578460. Its totient is φ = 49366385632.

The previous prime is 61707982033. The next prime is 61707982069. The reversal of 61707982045 is 54028970716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45566025444 + 16141956601 = 213462^2 + 127051^2 .

It is a cyclic number.

It is not a de Polignac number, because 61707982045 - 2⁷ = 61707981917 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 61707982045.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6170798200 + ... + 6170798209.

It is an arithmetic number, because the mean of its divisors is an integer number (18512394615).

Almost surely, 2^61707982045 is an apocalyptic number.

It is an amenable number.

61707982045 is a deficient number, since it is larger than the sum of its proper divisors (12341596415).

61707982045 is a wasteful number, since it uses less digits than its factorization.

61707982045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12341596414.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 61707982045 in words is "sixty-one billion, seven hundred seven million, nine hundred eighty-two thousand, forty-five".