811480652721 has 48 divisors (see below), whose sum is σ = 1209196285440. Its totient is φ = 524017019520.

The previous prime is 811480652701. The next prime is 811480652747. The reversal of 811480652721 is 127256084118.

811480652721 is a `hidden beast` number, since 8 + 114 + 8 + 0 + 6 + 527 + 2 + 1 = 666.

It is not a de Polignac number, because 811480652721 - 2¹⁵ = 811480619953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (811480652701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 233921775 + ... + 233925243.

It is an arithmetic number, because the mean of its divisors is an integer number (25191589280).

Almost surely, 2^811480652721 is an apocalyptic number.

It is an amenable number.

811480652721 is a deficient number, since it is larger than the sum of its proper divisors (397715632719).

811480652721 is a wasteful number, since it uses less digits than its factorization.

811480652721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6446 (or 6443 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 811480652721 in words is "eight hundred eleven billion, four hundred eighty million, six hundred fifty-two thousand, seven hundred twenty-one".