61355543023 has 16 divisors (see below), whose sum is σ = 62164650240. Its totient is φ = 60552778176.

The previous prime is 61355543021. The next prime is 61355543027. The reversal of 61355543023 is 32034555316.

It is a cyclic number.

It is not a de Polignac number, because 61355543023 - 2¹ = 61355543021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61355543021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18462240 + ... + 18465562.

It is an arithmetic number, because the mean of its divisors is an integer number (3885290640).

Almost surely, 2^61355543023 is an apocalyptic number.

61355543023 is a deficient number, since it is larger than the sum of its proper divisors (809107217).

61355543023 is a wasteful number, since it uses less digits than its factorization.

61355543023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206.

The product of its (nonzero) digits is 162000, while the sum is 37.

The spelling of 61355543023 in words is "sixty-one billion, three hundred fifty-five million, five hundred forty-three thousand, twenty-three".