51906720220070 has 16 divisors (see below), whose sum is σ = 93432214141200. Its totient is φ = 20762661922464.

The previous prime is 51906720220001. The next prime is 51906720220079. The reversal of 51906720220070 is 7002202760915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51906720220079) 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, 6431756 + ... + 12049104.

It is an arithmetic number, because the mean of its divisors is an integer number (5839513383825).

Almost surely, 2^{51906720220070} is an apocalyptic number.

51906720220070 is a deficient number, since it is larger than the sum of its proper divisors (41525493921130).

51906720220070 is a wasteful number, since it uses less digits than its factorization.

51906720220070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541399.

The product of its (nonzero) digits is 105840, while the sum is 41.

Adding to 51906720220070 its reverse (7002202760915), we get a palindrome (58908922980985).

The spelling of 51906720220070 in words is "fifty-one trillion, nine hundred six billion, seven hundred twenty million, two hundred twenty thousand, seventy".