123354656646 has 32 divisors (see below), whose sum is σ = 270042487008. Its totient is φ = 37333059840.

The previous prime is 123354656639. The next prime is 123354656651. The reversal of 123354656646 is 646656453321.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12958111 + ... + 12967626.

It is an arithmetic number, because the mean of its divisors is an integer number (8438827719).

Almost surely, 2^123354656646 is an apocalyptic number.

123354656646 is an abundant number, since it is smaller than the sum of its proper divisors (146687830362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123354656646 is a wasteful number, since it uses less digits than its factorization.

123354656646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25925816.

The product of its digits is 9331200, while the sum is 51.

The spelling of 123354656646 in words is "one hundred twenty-three billion, three hundred fifty-four million, six hundred fifty-six thousand, six hundred forty-six".