61253471828 has 12 divisors (see below), whose sum is σ = 107511659892. Its totient is φ = 30535854720.

The previous prime is 61253471791. The next prime is 61253471863. The reversal of 61253471828 is 82817435216.

It can be written as a sum of positive squares in 2 ways, for example, as 15411236164 + 45842235664 = 124142^2 + 214108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22718783 + ... + 22721478.

It is an arithmetic number, because the mean of its divisors is an integer number (8959304991).

Almost surely, 2^61253471828 is an apocalyptic number.

It is an amenable number.

61253471828 is a deficient number, since it is larger than the sum of its proper divisors (46258188064).

61253471828 is a wasteful number, since it uses less digits than its factorization.

61253471828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45440602 (or 45440600 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The spelling of 61253471828 in words is "sixty-one billion, two hundred fifty-three million, four hundred seventy-one thousand, eight hundred twenty-eight".