61209859623 has 16 divisors (see below), whose sum is σ = 89630064000. Its totient is φ = 36847909280.

The previous prime is 61209859619. The next prime is 61209859639. The reversal of 61209859623 is 32695890216.

It is a cyclic number.

It is not a de Polignac number, because 61209859623 - 2² = 61209859619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61209859663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6219393 + ... + 6229226.

It is an arithmetic number, because the mean of its divisors is an integer number (5601879000).

Almost surely, 2^61209859623 is an apocalyptic number.

61209859623 is a deficient number, since it is larger than the sum of its proper divisors (28420204377).

61209859623 is a wasteful number, since it uses less digits than its factorization.

61209859623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12448782.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 61209859623 in words is "sixty-one billion, two hundred nine million, eight hundred fifty-nine thousand, six hundred twenty-three".