123542401366 has 4 divisors (see below), whose sum is σ = 185313602052. Its totient is φ = 61771200682.

The previous prime is 123542401363. The next prime is 123542401379. The reversal of 123542401366 is 663104245321.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123542401363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30885600340 + ... + 30885600343.

It is an arithmetic number, because the mean of its divisors is an integer number (46328400513).

Almost surely, 2^123542401366 is an apocalyptic number.

123542401366 is a deficient number, since it is larger than the sum of its proper divisors (61771200686).

123542401366 is an equidigital number, since it uses as much as digits as its factorization.

123542401366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61771200685.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 123542401366 its reverse (663104245321), we get a palindrome (786646646687).

The spelling of 123542401366 in words is "one hundred twenty-three billion, five hundred forty-two million, four hundred one thousand, three hundred sixty-six".