101857385489 has 2 divisors, whose sum is σ = 101857385490. Its totient is φ = 101857385488.

The previous prime is 101857385449. The next prime is 101857385533. The reversal of 101857385489 is 984583758101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96824901889 + 5032483600 = 311167^2 + 70940^2 .

It is a cyclic number.

It is not a de Polignac number, because 101857385489 - 2³⁶ = 33137908753 is a prime.

It is not a weakly prime, because it can be changed into another prime (101857385449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50928692744 + 50928692745.

It is an arithmetic number, because the mean of its divisors is an integer number (50928692745).

Almost surely, 2^101857385489 is an apocalyptic number.

It is an amenable number.

101857385489 is a deficient number, since it is larger than the sum of its proper divisors (1).

101857385489 is an equidigital number, since it uses as much as digits as its factorization.

101857385489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9676800, while the sum is 59.

The spelling of 101857385489 in words is "one hundred one billion, eight hundred fifty-seven million, three hundred eighty-five thousand, four hundred eighty-nine".