51782639499 has 16 divisors (see below), whose sum is σ = 76855290240. Its totient is φ = 34458638760.

The previous prime is 51782639479. The next prime is 51782639543. The reversal of 51782639499 is 99493628715.

51782639499 is a `hidden beast` number, since 5 + 1 + 7 + 82 + 63 + 9 + 499 = 666.

It is not a de Polignac number, because 51782639499 - 2¹⁵ = 51782606731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51782639479) 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, 1738317 + ... + 1767854.

It is an arithmetic number, because the mean of its divisors is an integer number (4803455640).

Almost surely, 2^51782639499 is an apocalyptic number.

51782639499 is a deficient number, since it is larger than the sum of its proper divisors (25072650741).

51782639499 is a wasteful number, since it uses less digits than its factorization.

51782639499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506727 (or 3506721 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 51782639499 in words is "fifty-one billion, seven hundred eighty-two million, six hundred thirty-nine thousand, four hundred ninety-nine".