102378768881 has 4 divisors (see below), whose sum is σ = 102399091200. Its totient is φ = 102358446564.

The previous prime is 102378768871. The next prime is 102378768893. The reversal of 102378768881 is 188867873201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102378768881 is a prime.

It is a super-2 number, since 2×102378768881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102378768881.

It is not an unprimeable number, because it can be changed into a prime (102378768851) 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 3 ways as a sum of consecutive naturals, for example, 10153601 + ... + 10163678.

It is an arithmetic number, because the mean of its divisors is an integer number (25599772800).

Almost surely, 2^102378768881 is an apocalyptic number.

It is an amenable number.

102378768881 is a deficient number, since it is larger than the sum of its proper divisors (20322319).

102378768881 is an equidigital number, since it uses as much as digits as its factorization.

102378768881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20322318.

The product of its (nonzero) digits is 7225344, while the sum is 59.

The spelling of 102378768881 in words is "one hundred two billion, three hundred seventy-eight million, seven hundred sixty-eight thousand, eight hundred eighty-one".