51404545874017 has 4 divisors (see below), whose sum is σ = 58748052427456. Its totient is φ = 44061039320580.

The previous prime is 51404545873981. The next prime is 51404545874021. The reversal of 51404545874017 is 71047854540415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51404545874017 - 2¹⁵ = 51404545841249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51404545874027) 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, 3671753276709 + ... + 3671753276722.

It is an arithmetic number, because the mean of its divisors is an integer number (14687013106864).

Almost surely, 2^{51404545874017} is an apocalyptic number.

It is an amenable number.

51404545874017 is a deficient number, since it is larger than the sum of its proper divisors (7343506553439).

51404545874017 is an equidigital number, since it uses as much as digits as its factorization.

51404545874017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7343506553438.

The product of its (nonzero) digits is 12544000, while the sum is 55.

It can be divided in two parts, 5140454 and 5874017, that added together give a triangular number (11014471 = T₄₆₉₃).

The spelling of 51404545874017 in words is "fifty-one trillion, four hundred four billion, five hundred forty-five million, eight hundred seventy-four thousand, seventeen".