102188728783 has 4 divisors (see below), whose sum is σ = 102193552840. Its totient is φ = 102183904728.

The previous prime is 102188728777. The next prime is 102188728799. The reversal of 102188728783 is 387827881201.

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-102188728783 is a prime.

It is a super-2 number, since 2×102188728783² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102188728703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2380113 + ... + 2422666.

It is an arithmetic number, because the mean of its divisors is an integer number (25548388210).

Almost surely, 2^102188728783 is an apocalyptic number.

102188728783 is a deficient number, since it is larger than the sum of its proper divisors (4824057).

102188728783 is an equidigital number, since it uses as much as digits as its factorization.

102188728783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4824056.

The product of its (nonzero) digits is 2408448, while the sum is 55.

The spelling of 102188728783 in words is "one hundred two billion, one hundred eighty-eight million, seven hundred twenty-eight thousand, seven hundred eighty-three".