102757481891 has 2 divisors, whose sum is σ = 102757481892. Its totient is φ = 102757481890.

The previous prime is 102757481881. The next prime is 102757481923. The reversal of 102757481891 is 198184757201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102757481891 is a prime.

It is not a weakly prime, because it can be changed into another prime (102757481881) 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, 51378740945 + 51378740946.

It is an arithmetic number, because the mean of its divisors is an integer number (51378740946).

Almost surely, 2^102757481891 is an apocalyptic number.

102757481891 is a deficient number, since it is larger than the sum of its proper divisors (1).

102757481891 is an equidigital number, since it uses as much as digits as its factorization.

102757481891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 53.

The spelling of 102757481891 in words is "one hundred two billion, seven hundred fifty-seven million, four hundred eighty-one thousand, eight hundred ninety-one".