818860557723 has 32 divisors (see below), whose sum is σ = 1194802162176. Its totient is φ = 495788629248.

The previous prime is 818860557703. The next prime is 818860557761. The reversal of 818860557723 is 327755068818.

It is not a de Polignac number, because 818860557723 - 2⁶ = 818860557659 is a prime.

It is a super-2 number, since 2×818860557723² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (818860557703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1960111 + ... + 2340887.

It is an arithmetic number, because the mean of its divisors is an integer number (37337567568).

Almost surely, 2^818860557723 is an apocalyptic number.

818860557723 is a deficient number, since it is larger than the sum of its proper divisors (375941604453).

818860557723 is a wasteful number, since it uses less digits than its factorization.

818860557723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381683.

The product of its (nonzero) digits is 22579200, while the sum is 60.

The spelling of 818860557723 in words is "eight hundred eighteen billion, eight hundred sixty million, five hundred fifty-seven thousand, seven hundred twenty-three".