123355403254 has 4 divisors (see below), whose sum is σ = 185033104884. Its totient is φ = 61677701626.

The previous prime is 123355403243. The next prime is 123355403257. The reversal of 123355403254 is 452304553321.

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 (123355403257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30838850812 + ... + 30838850815.

It is an arithmetic number, because the mean of its divisors is an integer number (46258276221).

Almost surely, 2^123355403254 is an apocalyptic number.

123355403254 is a deficient number, since it is larger than the sum of its proper divisors (61677701630).

123355403254 is an equidigital number, since it uses as much as digits as its factorization.

123355403254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61677701629.

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 123355403254 its reverse (452304553321), we get a palindrome (575659956575).

The spelling of 123355403254 in words is "one hundred twenty-three billion, three hundred fifty-five million, four hundred three thousand, two hundred fifty-four".