78090502869 has 16 divisors (see below), whose sum is σ = 119678932800. Its totient is φ = 50265150768.

The previous prime is 78090502859. The next prime is 78090502871. The reversal of 78090502869 is 96820509087.

It is a happy number.

78090502869 is a `hidden beast` number, since 78 + 0 + 9 + 0 + 502 + 8 + 69 = 666.

It is not a de Polignac number, because 78090502869 - 2⁷ = 78090502741 is a prime.

It is a super-2 number, since 2×78090502869² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78090502859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49865439 + ... + 49867004.

It is an arithmetic number, because the mean of its divisors is an integer number (7479933300).

Almost surely, 2^78090502869 is an apocalyptic number.

It is an amenable number.

78090502869 is a deficient number, since it is larger than the sum of its proper divisors (41588429931).

78090502869 is a wasteful number, since it uses less digits than its factorization.

78090502869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99732481 (or 99732475 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 78090502869 in words is "seventy-eight billion, ninety million, five hundred two thousand, eight hundred sixty-nine".