90155338573 has 2 divisors, whose sum is σ = 90155338574. Its totient is φ = 90155338572.

The previous prime is 90155338549. The next prime is 90155338619. The reversal of 90155338573 is 37583355109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89926814884 + 228523689 = 299878^2 + 15117^2 .

It is a cyclic number.

It is not a de Polignac number, because 90155338573 - 2¹³ = 90155330381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90155338513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45077669286 + 45077669287.

It is an arithmetic number, because the mean of its divisors is an integer number (45077669287).

Almost surely, 2^90155338573 is an apocalyptic number.

It is an amenable number.

90155338573 is a deficient number, since it is larger than the sum of its proper divisors (1).

90155338573 is an equidigital number, since it uses as much as digits as its factorization.

90155338573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701000, while the sum is 49.

The spelling of 90155338573 in words is "ninety billion, one hundred fifty-five million, three hundred thirty-eight thousand, five hundred seventy-three".