102804502991 has 4 divisors (see below), whose sum is σ = 102949503000. Its totient is φ = 102659502984.

The previous prime is 102804502963. The next prime is 102804503003. The reversal of 102804502991 is 199205408201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102804502991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102804502901) 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 in 3 ways as a sum of consecutive naturals, for example, 72498941 + ... + 72500358.

It is an arithmetic number, because the mean of its divisors is an integer number (25737375750).

Almost surely, 2^102804502991 is an apocalyptic number.

102804502991 is a deficient number, since it is larger than the sum of its proper divisors (145000009).

102804502991 is an equidigital number, since it uses as much as digits as its factorization.

102804502991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145000008.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 102804502991 in words is "one hundred two billion, eight hundred four million, five hundred two thousand, nine hundred ninety-one".