123787861085 has 8 divisors (see below), whose sum is σ = 169766209536. Its totient is φ = 84883104720.

The previous prime is 123787861031. The next prime is 123787861123. The reversal of 123787861085 is 580168787321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123787861085 - 2⁸ = 123787860829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123787861085.

It is a congruent number.

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, 1768397981 + ... + 1768398050.

It is an arithmetic number, because the mean of its divisors is an integer number (21220776192).

Almost surely, 2^123787861085 is an apocalyptic number.

It is an amenable number.

123787861085 is a deficient number, since it is larger than the sum of its proper divisors (45978348451).

123787861085 is an equidigital number, since it uses as much as digits as its factorization.

123787861085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536796043.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 123787861085 in words is "one hundred twenty-three billion, seven hundred eighty-seven million, eight hundred sixty-one thousand, eighty-five".