51500016663 has 16 divisors (see below), whose sum is σ = 69618796800. Its totient is φ = 33860563200.

The previous prime is 51500016649. The next prime is 51500016683. The reversal of 51500016663 is 36661000515.

It is not a de Polignac number, because 51500016663 - 2²² = 51495822359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51500016683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345978 + ... + 471911.

It is an arithmetic number, because the mean of its divisors is an integer number (4351174800).

Almost surely, 2^51500016663 is an apocalyptic number.

51500016663 is a deficient number, since it is larger than the sum of its proper divisors (18118780137).

51500016663 is a wasteful number, since it uses less digits than its factorization.

51500016663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818182.

The product of its (nonzero) digits is 16200, while the sum is 33.

The spelling of 51500016663 in words is "fifty-one billion, five hundred million, sixteen thousand, six hundred sixty-three".