123400004113555 has 16 divisors (see below), whose sum is σ = 159479547361344. Its totient is φ = 91121143847040.

The previous prime is 123400004113553. The next prime is 123400004113583. The reversal of 123400004113555 is 555311400004321.

It is not a de Polignac number, because 123400004113555 - 2¹ = 123400004113553 is a prime.

It is a super-2 number, since 2×123400004113555² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123400004113555.

It is not an unprimeable number, because it can be changed into a prime (123400004113553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51028279 + ... + 53391808.

It is an arithmetic number, because the mean of its divisors is an integer number (9967471710084).

Almost surely, 2^{123400004113555} is an apocalyptic number.

123400004113555 is a deficient number, since it is larger than the sum of its proper divisors (36079543247789).

123400004113555 is a wasteful number, since it uses less digits than its factorization.

123400004113555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104438286.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 123400004113555 its reverse (555311400004321), we get a palindrome (678711404117876).

The spelling of 123400004113555 in words is "one hundred twenty-three trillion, four hundred billion, four million, one hundred thirteen thousand, five hundred fifty-five".