810287651220 has 96 divisors (see below), whose sum is σ = 2275319870208. Its totient is φ = 215457134592.

The previous prime is 810287651219. The next prime is 810287651249. The reversal of 810287651220 is 22156782018.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32304604 + ... + 32329676.

It is an arithmetic number, because the mean of its divisors is an integer number (23701248648).

Almost surely, 2^810287651220 is an apocalyptic number.

It is an amenable number.

810287651220 is an abundant number, since it is smaller than the sum of its proper divisors (1465032218988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

810287651220 is a wasteful number, since it uses less digits than its factorization.

810287651220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26609 (or 26607 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 810287651220 in words is "eight hundred ten billion, two hundred eighty-seven million, six hundred fifty-one thousand, two hundred twenty".