61719240724 has 24 divisors (see below), whose sum is σ = 114376003560. Its totient is φ = 29040823296.

The previous prime is 61719240721. The next prime is 61719240757. The reversal of 61719240724 is 42704291716.

It can be written as a sum of positive squares in 4 ways, for example, as 30912672400 + 30806568324 = 175820^2 + 175518^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61719240721) 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, 559294 + ... + 660490.

It is an arithmetic number, because the mean of its divisors is an integer number (4765666815).

Almost surely, 2^61719240724 is an apocalyptic number.

It is an amenable number.

61719240724 is a deficient number, since it is larger than the sum of its proper divisors (52656762836).

61719240724 is a wasteful number, since it uses less digits than its factorization.

61719240724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110187 (or 110185 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 61719240724 in words is "sixty-one billion, seven hundred nineteen million, two hundred forty thousand, seven hundred twenty-four".