51017496487 has 8 divisors (see below), whose sum is σ = 51208312320. Its totient is φ = 50826746880.

The previous prime is 51017496479. The next prime is 51017496521. The reversal of 51017496487 is 78469471015.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51017496487 - 2³ = 51017496479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51017496407) 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, 1965063 + ... + 1990855.

It is an arithmetic number, because the mean of its divisors is an integer number (6401039040).

Almost surely, 2^51017496487 is an apocalyptic number.

51017496487 is a deficient number, since it is larger than the sum of its proper divisors (190815833).

51017496487 is a wasteful number, since it uses less digits than its factorization.

51017496487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33113.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 51017496487 in words is "fifty-one billion, seventeen million, four hundred ninety-six thousand, four hundred eighty-seven".