801891536 has 10 divisors (see below), whose sum is σ = 1553664882. Its totient is φ = 400945760.

The previous prime is 801891533. The next prime is 801891553. The reversal of 801891536 is 635198108.

It can be written as a sum of positive squares in only one way, i.e., 786241600 + 15649936 = 28040^2 + 3956^2 .

It is a junction number, because it is equal to n+sod(n) for n = 801891493 and 801891502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801891533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25059095 + ... + 25059126.

Almost surely, 2^801891536 is an apocalyptic number.

It is an amenable number.

801891536 is a deficient number, since it is larger than the sum of its proper divisors (751773346).

801891536 is a wasteful number, since it uses less digits than its factorization.

801891536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50118229 (or 50118223 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 801891536 is about 28317.6894537672. The cubic root of 801891536 is about 929.0488352053.

The spelling of 801891536 in words is "eight hundred one million, eight hundred ninety-one thousand, five hundred thirty-six".