8630781533 has 18 divisors (see below), whose sum is σ = 9917200062. Its totient is φ = 7504971760.

The previous prime is 8630781491. The next prime is 8630781563. The reversal of 8630781533 is 3351870368.

It can be written as a sum of positive squares in only one way, i.e., 6802620484 + 1828161049 = 82478^2 + 42757^2 .

It is not a de Polignac number, because 8630781533 - 2¹⁶ = 8630715997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8630781563) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3410 + ... + 131427.

It is an arithmetic number, because the mean of its divisors is an integer number (550955559).

Almost surely, 2^8630781533 is an apocalyptic number.

It is an amenable number.

8630781533 is a deficient number, since it is larger than the sum of its proper divisors (1286418529).

8630781533 is a wasteful number, since it uses less digits than its factorization.

8630781533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134905 (or 134871 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 8630781533 is about 92901.9996178769. Note that the first 3 decimals coincide. The cubic root of 8630781533 is about 2051.2410912708.

The spelling of 8630781533 in words is "eight billion, six hundred thirty million, seven hundred eighty-one thousand, five hundred thirty-three".