61218346773 has 8 divisors (see below), whose sum is σ = 85173352128. Its totient is φ = 39037786304.

The previous prime is 61218346771. The next prime is 61218346801. The reversal of 61218346773 is 37764381216.

61218346773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61218346773 - 2¹ = 61218346771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61218346771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443611140 + ... + 443611277.

It is an arithmetic number, because the mean of its divisors is an integer number (10646669016).

Almost surely, 2^61218346773 is an apocalyptic number.

It is an amenable number.

61218346773 is a deficient number, since it is larger than the sum of its proper divisors (23955005355).

61218346773 is a wasteful number, since it uses less digits than its factorization.

61218346773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887222443.

The product of its digits is 1016064, while the sum is 48.

The spelling of 61218346773 in words is "sixty-one billion, two hundred eighteen million, three hundred forty-six thousand, seven hundred seventy-three".