51663492309 has 16 divisors (see below), whose sum is σ = 80927429184. Its totient is φ = 28902652800.

The previous prime is 51663492281. The next prime is 51663492313. The reversal of 51663492309 is 90329436615.

It is not a de Polignac number, because 51663492309 - 2¹⁷ = 51663361237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51663492359) 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, 60213432 + ... + 60214289.

It is an arithmetic number, because the mean of its divisors is an integer number (5057964324).

Almost surely, 2^51663492309 is an apocalyptic number.

It is an amenable number.

51663492309 is a deficient number, since it is larger than the sum of its proper divisors (29263936875).

51663492309 is a wasteful number, since it uses less digits than its factorization.

51663492309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120427748.

The product of its (nonzero) digits is 1049760, while the sum is 48.

The spelling of 51663492309 in words is "fifty-one billion, six hundred sixty-three million, four hundred ninety-two thousand, three hundred nine".