69878999987898 has 16 divisors (see below), whose sum is σ = 139774893342336. Its totient is φ = 23290184434880.

The previous prime is 69878999987869. The next prime is 69878999987899. The reversal of 69878999987898 is 89878999987896.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (69878999987899) 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, 703836498 + ... + 703935773.

It is an arithmetic number, because the mean of its divisors is an integer number (8735930833896).

Almost surely, 2^{69878999987898} is an apocalyptic number.

69878999987898 is an abundant number, since it is smaller than the sum of its proper divisors (69895893354438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69878999987898 is a wasteful number, since it uses less digits than its factorization.

69878999987898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407780549.

The product of its digits is 5119792054272, while the sum is 114.

The spelling of 69878999987898 in words is "sixty-nine trillion, eight hundred seventy-eight billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, eight hundred ninety-eight".