102485969878 has 4 divisors (see below), whose sum is σ = 153728954820. Its totient is φ = 51242984938.

The previous prime is 102485969857. The next prime is 102485969879. The reversal of 102485969878 is 878969584201.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102485969879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25621492468 + ... + 25621492471.

It is an arithmetic number, because the mean of its divisors is an integer number (38432238705).

Almost surely, 2^102485969878 is an apocalyptic number.

102485969878 is a deficient number, since it is larger than the sum of its proper divisors (51242984942).

102485969878 is an equidigital number, since it uses as much as digits as its factorization.

102485969878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51242984941.

The product of its (nonzero) digits is 69672960, while the sum is 67.

The spelling of 102485969878 in words is "one hundred two billion, four hundred eighty-five million, nine hundred sixty-nine thousand, eight hundred seventy-eight".