51040257999 has 8 divisors (see below), whose sum is σ = 68689693440. Its totient is φ = 33708830616.

The previous prime is 51040257997. The next prime is 51040258079. The reversal of 51040257999 is 99975204015.

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

It is not a de Polignac number, because 51040257999 - 2¹ = 51040257997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51040257997) 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, 79501639 + ... + 79502280.

It is an arithmetic number, because the mean of its divisors is an integer number (8586211680).

Almost surely, 2^51040257999 is an apocalyptic number.

51040257999 is a deficient number, since it is larger than the sum of its proper divisors (17649435441).

51040257999 is a wasteful number, since it uses less digits than its factorization.

51040257999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159004029.

The product of its (nonzero) digits is 1020600, while the sum is 51.

The spelling of 51040257999 in words is "fifty-one billion, forty million, two hundred fifty-seven thousand, nine hundred ninety-nine".