51505340206 has 16 divisors (see below), whose sum is σ = 80136381600. Its totient is φ = 24797975328.

The previous prime is 51505340189. The next prime is 51505340267. The reversal of 51505340206 is 60204350515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168746 + ... + 1212013.

It is an arithmetic number, because the mean of its divisors is an integer number (5008523850).

Almost surely, 2^51505340206 is an apocalyptic number.

51505340206 is a deficient number, since it is larger than the sum of its proper divisors (28631041394).

51505340206 is a wasteful number, since it uses less digits than its factorization.

51505340206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381163.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 51505340206 in words is "fifty-one billion, five hundred five million, three hundred forty thousand, two hundred six".