123451103555 has 64 divisors (see below), whose sum is σ = 167948605440. Its totient is φ = 86430744576.

The previous prime is 123451103549. The next prime is 123451103561. The reversal of 123451103555 is 555301154321.

It is an interprime number because it is at equal distance from previous prime (123451103549) and next prime (123451103561).

It is a cyclic number.

It is not a de Polignac number, because 123451103555 - 2¹⁸ = 123450841411 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 160534211 + ... + 160534979.

It is an arithmetic number, because the mean of its divisors is an integer number (2624196960).

Almost surely, 2^123451103555 is an apocalyptic number.

123451103555 is a deficient number, since it is larger than the sum of its proper divisors (44497501885).

123451103555 is a wasteful number, since it uses less digits than its factorization.

123451103555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620.

The product of its (nonzero) digits is 45000, while the sum is 35.

Adding to 123451103555 its reverse (555301154321), we get a palindrome (678752257876).

The spelling of 123451103555 in words is "one hundred twenty-three billion, four hundred fifty-one million, one hundred three thousand, five hundred fifty-five".