123351040534 has 4 divisors (see below), whose sum is σ = 185026560804. Its totient is φ = 61675520266.

The previous prime is 123351040523. The next prime is 123351040543. The reversal of 123351040534 is 435040153321.

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

It is a super-2 number, since 2×123351040534² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123351040496 and 123351040505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30837760132 + ... + 30837760135.

It is an arithmetic number, because the mean of its divisors is an integer number (46256640201).

Almost surely, 2^123351040534 is an apocalyptic number.

123351040534 is a deficient number, since it is larger than the sum of its proper divisors (61675520270).

123351040534 is an equidigital number, since it uses as much as digits as its factorization.

123351040534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61675520269.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 123351040534 its reverse (435040153321), we get a palindrome (558391193855).

The spelling of 123351040534 in words is "one hundred twenty-three billion, three hundred fifty-one million, forty thousand, five hundred thirty-four".