61844699688 has 32 divisors (see below), whose sum is σ = 154841524800. Its totient is φ = 20584263168.

The previous prime is 61844699663. The next prime is 61844699723. The reversal of 61844699688 is 88699644816.

61844699688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898308 + ... + 1930611.

It is an arithmetic number, because the mean of its divisors is an integer number (4838797650).

Almost surely, 2^61844699688 is an apocalyptic number.

It is an amenable number.

61844699688 is an abundant number, since it is smaller than the sum of its proper divisors (92996825112).

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

61844699688 is a wasteful number, since it uses less digits than its factorization.

61844699688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829601 (or 3829597 counting only the distinct ones).

The product of its digits is 143327232, while the sum is 69.

The spelling of 61844699688 in words is "sixty-one billion, eight hundred forty-four million, six hundred ninety-nine thousand, six hundred eighty-eight".