90456045545 has 4 divisors (see below), whose sum is σ = 108547254660. Its totient is φ = 72364836432.

The previous prime is 90456045499. The next prime is 90456045551. The reversal of 90456045545 is 54554065409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54554065409 = 137 ⋅398204857.

It can be written as a sum of positive squares in 2 ways, for example, as 72154555456 + 18301490089 = 268616^2 + 135283^2 .

It is a cyclic number.

It is not a de Polignac number, because 90456045545 - 2⁸ = 90456045289 is a prime.

It is a super-2 number, since 2×90456045545² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90456045545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9045604550 + ... + 9045604559.

It is an arithmetic number, because the mean of its divisors is an integer number (27136813665).

Almost surely, 2^90456045545 is an apocalyptic number.

It is an amenable number.

90456045545 is a deficient number, since it is larger than the sum of its proper divisors (18091209115).

90456045545 is a wasteful number, since it uses less digits than its factorization.

90456045545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18091209114.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 90456045545 in words is "ninety billion, four hundred fifty-six million, forty-five thousand, five hundred forty-five".