145872885889 has 2 divisors, whose sum is σ = 145872885890. Its totient is φ = 145872885888.

The previous prime is 145872885869. The next prime is 145872885923. The reversal of 145872885889 is 988588278541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132918576400 + 12954309489 = 364580^2 + 113817^2 .

It is a cyclic number.

It is not a de Polignac number, because 145872885889 - 2²³ = 145864497281 is a prime.

It is not a weakly prime, because it can be changed into another prime (145872885869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72936442944 + 72936442945.

It is an arithmetic number, because the mean of its divisors is an integer number (72936442945).

Almost surely, 2^145872885889 is an apocalyptic number.

It is an amenable number.

145872885889 is a deficient number, since it is larger than the sum of its proper divisors (1).

145872885889 is an equidigital number, since it uses as much as digits as its factorization.

145872885889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 412876800, while the sum is 73.

The spelling of 145872885889 in words is "one hundred forty-five billion, eight hundred seventy-two million, eight hundred eighty-five thousand, eight hundred eighty-nine".