51226145565 has 32 divisors (see below), whose sum is σ = 94161125376. Its totient is φ = 23295051840.

The previous prime is 51226145561. The next prime is 51226145567. The reversal of 51226145565 is 56554162215.

It is not a de Polignac number, because 51226145565 - 2² = 51226145561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51226145561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1257087 + ... + 1297196.

It is an arithmetic number, because the mean of its divisors is an integer number (2942535168).

Almost surely, 2^51226145565 is an apocalyptic number.

It is an amenable number.

51226145565 is a deficient number, since it is larger than the sum of its proper divisors (42934979811).

51226145565 is a wasteful number, since it uses less digits than its factorization.

51226145565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554489.

The product of its digits is 360000, while the sum is 42.

The spelling of 51226145565 in words is "fifty-one billion, two hundred twenty-six million, one hundred forty-five thousand, five hundred sixty-five".