8551450993 has 4 divisors (see below), whose sum is σ = 9054477540. Its totient is φ = 8048424448.

The previous prime is 8551450987. The next prime is 8551451047. The reversal of 8551450993 is 3990541558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3990541558 = 2 ⋅1995270779.

It can be written as a sum of positive squares in 2 ways, for example, as 5650228224 + 2901222769 = 75168^2 + 53863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8551450993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8551456993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251513248 + ... + 251513281.

It is an arithmetic number, because the mean of its divisors is an integer number (2263619385).

Almost surely, 2^8551450993 is an apocalyptic number.

It is an amenable number.

8551450993 is a deficient number, since it is larger than the sum of its proper divisors (503026547).

8551450993 is a wasteful number, since it uses less digits than its factorization.

8551450993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503026546.

The product of its (nonzero) digits is 972000, while the sum is 49.

The square root of 8551450993 is about 92474.0557832304. The cubic root of 8551450993 is about 2044.9370196389.

The spelling of 8551450993 in words is "eight billion, five hundred fifty-one million, four hundred fifty thousand, nine hundred ninety-three".