51500535506 has 16 divisors (see below), whose sum is σ = 88460095680. Its totient is φ = 22028292240.

The previous prime is 51500535439. The next prime is 51500535509. The reversal of 51500535506 is 60553500515.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51500535509) 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, 3606440 + ... + 3620691.

It is an arithmetic number, because the mean of its divisors is an integer number (5528755980).

Almost surely, 2^51500535506 is an apocalyptic number.

51500535506 is a deficient number, since it is larger than the sum of its proper divisors (36959560174).

51500535506 is a wasteful number, since it uses less digits than its factorization.

51500535506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7227649.

The product of its (nonzero) digits is 56250, while the sum is 35.

The spelling of 51500535506 in words is "fifty-one billion, five hundred million, five hundred thirty-five thousand, five hundred six".