123646396901 has 4 divisors (see below), whose sum is σ = 123647553612. Its totient is φ = 123645240192.

The previous prime is 123646396897. The next prime is 123646396927. The reversal of 123646396901 is 109693646321.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 98737350625 + 24909046276 = 314225^2 + 157826^2 .

It is a cyclic number.

It is not a de Polignac number, because 123646396901 - 2² = 123646396897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123646396901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123646392901) 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, 399596 + ... + 637941.

It is an arithmetic number, because the mean of its divisors is an integer number (30911888403).

Almost surely, 2^123646396901 is an apocalyptic number.

It is an amenable number.

123646396901 is a deficient number, since it is larger than the sum of its proper divisors (1156711).

123646396901 is a wasteful number, since it uses less digits than its factorization.

123646396901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156710.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 123646396901 in words is "one hundred twenty-three billion, six hundred forty-six million, three hundred ninety-six thousand, nine hundred one".