69878999987792 has 20 divisors (see below), whose sum is σ = 135609996146196. Its totient is φ = 34882871950080.

The previous prime is 69878999987791. The next prime is 69878999987807. The reversal of 69878999987792 is 29778999987896.

It can be written as a sum of positive squares in 2 ways, for example, as 17043488397376 + 52835511590416 = 4128376^2 + 7268804^2 .

It is a super-2 number, since 2×69878999987792² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 69878999987792.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69878999987791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3539242559 + ... + 3539262302.

Almost surely, 2^{69878999987792} is an apocalyptic number.

It is an amenable number.

69878999987792 is a deficient number, since it is larger than the sum of its proper divisors (65730996158404).

69878999987792 is a wasteful number, since it uses less digits than its factorization.

69878999987792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078505486 (or 7078505480 counting only the distinct ones).

The product of its digits is 1119954511872, while the sum is 107.

The spelling of 69878999987792 in words is "sixty-nine trillion, eight hundred seventy-eight billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, seven hundred ninety-two".