8020553865 has 64 divisors (see below), whose sum is σ = 13529617920. Its totient is φ = 4053104640.

The previous prime is 8020553851. The next prime is 8020553911. The reversal of 8020553865 is 5683550208.

It is not a de Polignac number, because 8020553865 - 2⁸ = 8020553609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3356091 + ... + 3358479.

It is an arithmetic number, because the mean of its divisors is an integer number (211400280).

Almost surely, 2^8020553865 is an apocalyptic number.

It is an amenable number.

8020553865 is a deficient number, since it is larger than the sum of its proper divisors (5509064055).

8020553865 is a wasteful number, since it uses less digits than its factorization.

8020553865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594.

The product of its (nonzero) digits is 288000, while the sum is 42.

The square root of 8020553865 is about 89557.5449920329. The cubic root of 8020553865 is about 2001.7113572938.

The spelling of 8020553865 in words is "eight billion, twenty million, five hundred fifty-three thousand, eight hundred sixty-five".