123396801861 has 16 divisors (see below), whose sum is σ = 173221711040. Its totient is φ = 77919874560.

The previous prime is 123396801841. The next prime is 123396801911. The reversal of 123396801861 is 168108693321.

It is not a de Polignac number, because 123396801861 - 2³¹ = 121249318213 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123396801861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123396801841) 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, 96051 + ... + 505983.

It is an arithmetic number, because the mean of its divisors is an integer number (10826356940).

Almost surely, 2^123396801861 is an apocalyptic number.

It is an amenable number.

123396801861 is a deficient number, since it is larger than the sum of its proper divisors (49824909179).

123396801861 is a wasteful number, since it uses less digits than its factorization.

123396801861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415236.

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 123396801861 in words is "one hundred twenty-three billion, three hundred ninety-six million, eight hundred one thousand, eight hundred sixty-one".