123344777641 has 4 divisors (see below), whose sum is σ = 123353876052. Its totient is φ = 123335679232.

The previous prime is 123344777623. The next prime is 123344777653. The reversal of 123344777641 is 146777443321.

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 106863610000 + 16481167641 = 326900^2 + 128379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123344777641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123344775641) 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, 4528840 + ... + 4555993.

It is an arithmetic number, because the mean of its divisors is an integer number (30838469013).

Almost surely, 2^123344777641 is an apocalyptic number.

It is an amenable number.

123344777641 is a deficient number, since it is larger than the sum of its proper divisors (9098411).

123344777641 is an equidigital number, since it uses as much as digits as its factorization.

123344777641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9098410.

The product of its digits is 2370816, while the sum is 49.

The spelling of 123344777641 in words is "one hundred twenty-three billion, three hundred forty-four million, seven hundred seventy-seven thousand, six hundred forty-one".