51011065197 has 24 divisors (see below), whose sum is σ = 77487883200. Its totient is φ = 33528388320.

The previous prime is 51011065159. The next prime is 51011065199. The reversal of 51011065197 is 79156011015.

51011065197 is a `hidden beast` number, since 510 + 1 + 1 + 0 + 6 + 51 + 97 = 666.

It is not a de Polignac number, because 51011065197 - 2¹⁴ = 51011048813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011065199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1461072 + ... + 1495577.

It is an arithmetic number, because the mean of its divisors is an integer number (3228661800).

Almost surely, 2^51011065197 is an apocalyptic number.

It is an amenable number.

51011065197 is a deficient number, since it is larger than the sum of its proper divisors (26476818003).

51011065197 is an equidigital number, since it uses as much as digits as its factorization.

51011065197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956735 (or 2956723 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 36.

The spelling of 51011065197 in words is "fifty-one billion, eleven million, sixty-five thousand, one hundred ninety-seven".