69439761387 has 12 divisors (see below), whose sum is σ = 100530361360. Its totient is φ = 46187720208.

The previous prime is 69439761367. The next prime is 69439761389. The reversal of 69439761387 is 78316793496.

69439761387 is a `hidden beast` number, since 6 + 9 + 4 + 3 + 9 + 7 + 613 + 8 + 7 = 666.

It is not a de Polignac number, because 69439761387 - 2¹⁰ = 69439760363 is a prime.

It is a super-2 number, since 2×69439761387² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69439761389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8783668 + ... + 8791569.

Almost surely, 2^69439761387 is an apocalyptic number.

69439761387 is a deficient number, since it is larger than the sum of its proper divisors (31090599973).

69439761387 is a wasteful number, since it uses less digits than its factorization.

69439761387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17575682 (or 17575679 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The spelling of 69439761387 in words is "sixty-nine billion, four hundred thirty-nine million, seven hundred sixty-one thousand, three hundred eighty-seven".