51970386444781 has 8 divisors (see below), whose sum is σ = 59574167632064. Its totient is φ = 44411465324160.

The previous prime is 51970386444749. The next prime is 51970386444799. The reversal of 51970386444781 is 18744468307915.

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 51970386444781 - 2⁵ = 51970386444749 is a prime.

It is a super-2 number, since 2×51970386444781² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51970386444701) 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, 11215014180 + ... + 11215018813.

It is an arithmetic number, because the mean of its divisors is an integer number (7446770954008).

Almost surely, 2^{51970386444781} is an apocalyptic number.

It is an amenable number.

51970386444781 is a deficient number, since it is larger than the sum of its proper divisors (7603781187283).

51970386444781 is a wasteful number, since it uses less digits than its factorization.

51970386444781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22430033331.

The product of its (nonzero) digits is 162570240, while the sum is 67.

The spelling of 51970386444781 in words is "fifty-one trillion, nine hundred seventy billion, three hundred eighty-six million, four hundred forty-four thousand, seven hundred eighty-one".