5451666642123 has 32 divisors (see below), whose sum is σ = 8152836636672. Its totient is φ = 3218224867200.

The previous prime is 5451666642001. The next prime is 5451666642137. The reversal of 5451666642123 is 3212466661545.

It is a de Polignac number, because none of the positive numbers 2^k-5451666642123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5451666642923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26503243 + ... + 26708148.

It is an arithmetic number, because the mean of its divisors is an integer number (254776144896).

Almost surely, 2^{5451666642123} is an apocalyptic number.

5451666642123 is a deficient number, since it is larger than the sum of its proper divisors (2701169994549).

5451666642123 is a wasteful number, since it uses less digits than its factorization.

5451666642123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53211515.

The product of its digits is 6220800, while the sum is 51.

The spelling of 5451666642123 in words is "five trillion, four hundred fifty-one billion, six hundred sixty-six million, six hundred forty-two thousand, one hundred twenty-three".