61223466545 has 36 divisors (see below), whose sum is σ = 80212929300. Its totient is φ = 44850336768.

The previous prime is 61223466533. The next prime is 61223466553. The reversal of 61223466545 is 54566432216.

It is a happy number.

61223466545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 18 ways, for example, as 2058255424 + 59165211121 = 45368^2 + 243239^2 .

It is not a de Polignac number, because 61223466545 - 2⁸ = 61223466289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61223466496 and 61223466505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1962731 + ... + 1993679.

It is an arithmetic number, because the mean of its divisors is an integer number (2228136925).

Almost surely, 2^61223466545 is an apocalyptic number.

It is an amenable number.

61223466545 is a deficient number, since it is larger than the sum of its proper divisors (18989462755).

61223466545 is a wasteful number, since it uses less digits than its factorization.

61223466545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31062 (or 31008 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 44.

The spelling of 61223466545 in words is "sixty-one billion, two hundred twenty-three million, four hundred sixty-six thousand, five hundred forty-five".