51505110499 has 4 divisors (see below), whose sum is σ = 51821092936. Its totient is φ = 51189128064.

The previous prime is 51505110463. The next prime is 51505110509. The reversal of 51505110499 is 99401150515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51505110499 - 2⁹ = 51505109987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51505170499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157990974 + ... + 157991299.

It is an arithmetic number, because the mean of its divisors is an integer number (12955273234).

Almost surely, 2^51505110499 is an apocalyptic number.

51505110499 is a deficient number, since it is larger than the sum of its proper divisors (315982437).

51505110499 is a wasteful number, since it uses less digits than its factorization.

51505110499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315982436.

The product of its (nonzero) digits is 40500, while the sum is 40.

The spelling of 51505110499 in words is "fifty-one billion, five hundred five million, one hundred ten thousand, four hundred ninety-nine".