12354555431551 has 4 divisors (see below), whose sum is σ = 12354692131512. Its totient is φ = 12354418731592.

The previous prime is 12354555431531. The next prime is 12354555431567. The reversal of 12354555431551 is 15513455545321.

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

It is a cyclic number.

It is not a de Polignac number, because 12354555431551 - 2⁴³ = 3558462409343 is a prime.

It is a super-2 number, since 2×12354555431551² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12354555431495 and 12354555431504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12354555431531) 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, 68214325 + ... + 68395198.

It is an arithmetic number, because the mean of its divisors is an integer number (3088673032878).

Almost surely, 2^{12354555431551} is an apocalyptic number.

12354555431551 is a deficient number, since it is larger than the sum of its proper divisors (136699961).

12354555431551 is an equidigital number, since it uses as much as digits as its factorization.

12354555431551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136699960.

The product of its digits is 4500000, while the sum is 49.

The spelling of 12354555431551 in words is "twelve trillion, three hundred fifty-four billion, five hundred fifty-five million, four hundred thirty-one thousand, five hundred fifty-one".