61780053460 has 12 divisors (see below), whose sum is σ = 129738112308. Its totient is φ = 24712021376.

The previous prime is 61780053451. The next prime is 61780053473. The reversal of 61780053460 is 6435008716.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12127735876 + 49652317584 = 110126^2 + 222828^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1544501317 + ... + 1544501356.

It is an arithmetic number, because the mean of its divisors is an integer number (10811509359).

Almost surely, 2^61780053460 is an apocalyptic number.

It is an amenable number.

61780053460 is an abundant number, since it is smaller than the sum of its proper divisors (67958058848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61780053460 is a wasteful number, since it uses less digits than its factorization.

61780053460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089002682 (or 3089002680 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 61780053460 in words is "sixty-one billion, seven hundred eighty million, fifty-three thousand, four hundred sixty".