102164887178 has 4 divisors (see below), whose sum is σ = 153247330770. Its totient is φ = 51082443588.

The previous prime is 102164887159. The next prime is 102164887189. The reversal of 102164887178 is 871788461201.

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

It can be written as a sum of positive squares in only one way, i.e., 102146077609 + 18809569 = 319603^2 + 4337^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 25541221793 + ... + 25541221796.

Almost surely, 2^102164887178 is an apocalyptic number.

102164887178 is a deficient number, since it is larger than the sum of its proper divisors (51082443592).

102164887178 is an equidigital number, since it uses as much as digits as its factorization.

102164887178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51082443591.

The product of its (nonzero) digits is 1204224, while the sum is 53.

The spelling of 102164887178 in words is "one hundred two billion, one hundred sixty-four million, eight hundred eighty-seven thousand, one hundred seventy-eight".