51665574870254 has 4 divisors (see below), whose sum is σ = 77498362305384. Its totient is φ = 25832787435126.

The previous prime is 51665574870241. The next prime is 51665574870323. The reversal of 51665574870254 is 45207847556615.

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

It is a super-4 number, since 4×51665574870254⁴ (a number of 56 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12916393717562 + ... + 12916393717565.

It is an arithmetic number, because the mean of its divisors is an integer number (19374590576346).

Almost surely, 2^{51665574870254} is an apocalyptic number.

51665574870254 is a deficient number, since it is larger than the sum of its proper divisors (25832787435130).

51665574870254 is a wasteful number, since it uses less digits than its factorization.

51665574870254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25832787435129.

The product of its (nonzero) digits is 282240000, while the sum is 65.

The spelling of 51665574870254 in words is "fifty-one trillion, six hundred sixty-five billion, five hundred seventy-four million, eight hundred seventy thousand, two hundred fifty-four".