123438361550771 has 2 divisors, whose sum is σ = 123438361550772. Its totient is φ = 123438361550770.

The previous prime is 123438361550731. The next prime is 123438361550783. The reversal of 123438361550771 is 177055163834321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123438361550771 - 2⁴⁶ = 53069617373107 is a prime.

It is not a weakly prime, because it can be changed into another prime (123438361550731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61719180775385 + 61719180775386.

It is an arithmetic number, because the mean of its divisors is an integer number (61719180775386).

Almost surely, 2^{123438361550771} is an apocalyptic number.

123438361550771 is a deficient number, since it is larger than the sum of its proper divisors (1).

123438361550771 is an equidigital number, since it uses as much as digits as its factorization.

123438361550771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 123438361550771 in words is "one hundred twenty-three trillion, four hundred thirty-eight billion, three hundred sixty-one million, five hundred fifty thousand, seven hundred seventy-one".