61773905671 has 4 divisors (see below), whose sum is σ = 62373652432. Its totient is φ = 61174158912.

The previous prime is 61773905659. The next prime is 61773905761. The reversal of 61773905671 is 17650937716.

61773905671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 61773905671 - 2¹¹ = 61773903623 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 (61773903671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299873226 + ... + 299873431.

It is an arithmetic number, because the mean of its divisors is an integer number (15593413108).

Almost surely, 2^61773905671 is an apocalyptic number.

61773905671 is a deficient number, since it is larger than the sum of its proper divisors (599746761).

61773905671 is a wasteful number, since it uses less digits than its factorization.

61773905671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599746760.

The product of its (nonzero) digits is 1666980, while the sum is 52.

The spelling of 61773905671 in words is "sixty-one billion, seven hundred seventy-three million, nine hundred five thousand, six hundred seventy-one".