123344777661 has 32 divisors (see below), whose sum is σ = 189278208000. Its totient is φ = 69987023616.

The previous prime is 123344777653. The next prime is 123344777819. The reversal of 123344777661 is 166777443321.

It is not a de Polignac number, because 123344777661 - 2³ = 123344777653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123344777561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3408340 + ... + 3444338.

It is an arithmetic number, because the mean of its divisors is an integer number (5914944000).

Almost surely, 2^123344777661 is an apocalyptic number.

It is an amenable number.

123344777661 is a deficient number, since it is larger than the sum of its proper divisors (65933430339).

123344777661 is a wasteful number, since it uses less digits than its factorization.

123344777661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37153.

The product of its digits is 3556224, while the sum is 51.

The spelling of 123344777661 in words is "one hundred twenty-three billion, three hundred forty-four million, seven hundred seventy-seven thousand, six hundred sixty-one".