51906866701 has 8 divisors (see below), whose sum is σ = 53025617304. Its totient is φ = 50796755520.

The previous prime is 51906866681. The next prime is 51906866731. The reversal of 51906866701 is 10766860915.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26033822500 + 25873044201 = 161350^2 + 160851^2 .

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 51906866701 - 2¹⁹ = 51906342413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51906866731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2147710 + ... + 2171743.

It is an arithmetic number, because the mean of its divisors is an integer number (6628202163).

Almost surely, 2^51906866701 is an apocalyptic number.

It is an amenable number.

51906866701 is a deficient number, since it is larger than the sum of its proper divisors (1118750603).

51906866701 is a wasteful number, since it uses less digits than its factorization.

51906866701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319711.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 51906866701 in words is "fifty-one billion, nine hundred six million, eight hundred sixty-six thousand, seven hundred one".