51693930511 has 2 divisors, whose sum is σ = 51693930512. Its totient is φ = 51693930510.

The previous prime is 51693930503. The next prime is 51693930523. The reversal of 51693930511 is 11503939615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51693930511 - 2³ = 51693930503 is a prime.

It is a super-2 number, since 2×51693930511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51693930551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25846965255 + 25846965256.

It is an arithmetic number, because the mean of its divisors is an integer number (25846965256).

Almost surely, 2^51693930511 is an apocalyptic number.

51693930511 is a deficient number, since it is larger than the sum of its proper divisors (1).

51693930511 is an equidigital number, since it uses as much as digits as its factorization.

51693930511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109350, while the sum is 43.

The spelling of 51693930511 in words is "fifty-one billion, six hundred ninety-three million, nine hundred thirty thousand, five hundred eleven".