61285122773 has 4 divisors (see below), whose sum is σ = 70040140320. Its totient is φ = 52530105228.

The previous prime is 61285122739. The next prime is 61285122793. The reversal of 61285122773 is 37722158216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61285122773 - 2⁸ = 61285122517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61285122793) 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, 4377508763 + ... + 4377508776.

It is an arithmetic number, because the mean of its divisors is an integer number (17510035080).

Almost surely, 2^61285122773 is an apocalyptic number.

It is an amenable number.

61285122773 is a deficient number, since it is larger than the sum of its proper divisors (8755017547).

61285122773 is an equidigital number, since it uses as much as digits as its factorization.

61285122773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8755017546.

The product of its digits is 282240, while the sum is 44.

The spelling of 61285122773 in words is "sixty-one billion, two hundred eighty-five million, one hundred twenty-two thousand, seven hundred seventy-three".