51424261217661 has 8 divisors (see below), whose sum is σ = 68568429516480. Its totient is φ = 34281466865312.

The previous prime is 51424261217561. The next prime is 51424261217669. The reversal of 51424261217661 is 16671216242415.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51424261217661 - 2⁴³ = 42628168195453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51424261217661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51424261217669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343399281 + ... + 343548998.

It is an arithmetic number, because the mean of its divisors is an integer number (8571053689560).

Almost surely, 2^{51424261217661} is an apocalyptic number.

It is an amenable number.

51424261217661 is a deficient number, since it is larger than the sum of its proper divisors (17144168298819).

51424261217661 is a wasteful number, since it uses less digits than its factorization.

51424261217661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686973235.

The product of its digits is 967680, while the sum is 48.

The spelling of 51424261217661 in words is "fifty-one trillion, four hundred twenty-four billion, two hundred sixty-one million, two hundred seventeen thousand, six hundred sixty-one".