123416444477 has 2 divisors, whose sum is σ = 123416444478. Its totient is φ = 123416444476.

The previous prime is 123416444443. The next prime is 123416444491. The reversal of 123416444477 is 774444614321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113753751076 + 9662693401 = 337274^2 + 98299^2 .

It is a cyclic number.

It is not a de Polignac number, because 123416444477 - 2²² = 123412250173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123416444407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61708222238 + 61708222239.

It is an arithmetic number, because the mean of its divisors is an integer number (61708222239).

Almost surely, 2^123416444477 is an apocalyptic number.

It is an amenable number.

123416444477 is a deficient number, since it is larger than the sum of its proper divisors (1).

123416444477 is an equidigital number, since it uses as much as digits as its factorization.

123416444477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 47.

The spelling of 123416444477 in words is "one hundred twenty-three billion, four hundred sixteen million, four hundred forty-four thousand, four hundred seventy-seven".