123353613507 has 4 divisors (see below), whose sum is σ = 164471484680. Its totient is φ = 82235742336.

The previous prime is 123353613469. The next prime is 123353613517. The reversal of 123353613507 is 705316353321.

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

It is not a de Polignac number, because 123353613507 - 2¹² = 123353609411 is a prime.

It is a super-2 number, since 2×123353613507² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123353613517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20558935582 + ... + 20558935587.

It is an arithmetic number, because the mean of its divisors is an integer number (41117871170).

Almost surely, 2^123353613507 is an apocalyptic number.

123353613507 is a deficient number, since it is larger than the sum of its proper divisors (41117871173).

123353613507 is an equidigital number, since it uses as much as digits as its factorization.

123353613507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41117871172.

The product of its (nonzero) digits is 170100, while the sum is 39.

Adding to 123353613507 its reverse (705316353321), we get a palindrome (828669966828).

The spelling of 123353613507 in words is "one hundred twenty-three billion, three hundred fifty-three million, six hundred thirteen thousand, five hundred seven".