123637215610543 has 4 divisors (see below), whose sum is σ = 123786716476680. Its totient is φ = 123487714744408.

The previous prime is 123637215610511. The next prime is 123637215610549. The reversal of 123637215610543 is 345016512736321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123637215610543 - 2⁵ = 123637215610511 is a prime.

It is a super-2 number, since 2×123637215610543² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123637215610549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74750431828 + ... + 74750433481.

It is an arithmetic number, because the mean of its divisors is an integer number (30946679119170).

Almost surely, 2^{123637215610543} is an apocalyptic number.

123637215610543 is a deficient number, since it is larger than the sum of its proper divisors (149500866137).

123637215610543 is an equidigital number, since it uses as much as digits as its factorization.

123637215610543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149500866136.

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 123637215610543 in words is "one hundred twenty-three trillion, six hundred thirty-seven billion, two hundred fifteen million, six hundred ten thousand, five hundred forty-three".