90281750057 has 2 divisors, whose sum is σ = 90281750058. Its totient is φ = 90281750056.

The previous prime is 90281750047. The next prime is 90281750059. The reversal of 90281750057 is 75005718209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76607721961 + 13674028096 = 276781^2 + 116936^2 .

It is a cyclic number.

It is not a de Polignac number, because 90281750057 - 2⁶ = 90281749993 is a prime.

Together with 90281750059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90281750059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45140875028 + 45140875029.

It is an arithmetic number, because the mean of its divisors is an integer number (45140875029).

Almost surely, 2^90281750057 is an apocalyptic number.

It is an amenable number.

90281750057 is a deficient number, since it is larger than the sum of its proper divisors (1).

90281750057 is an equidigital number, since it uses as much as digits as its factorization.

90281750057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 44.

The spelling of 90281750057 in words is "ninety billion, two hundred eighty-one million, seven hundred fifty thousand, fifty-seven".