811224781930 has 8 divisors (see below), whose sum is σ = 1460204607492. Its totient is φ = 324489912768.

The previous prime is 811224781909. The next prime is 811224781949. The reversal of 811224781930 is 39187422118.

811224781930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 788087634049 + 23137147881 = 887743^2 + 152109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40561239087 + ... + 40561239106.

Almost surely, 2^811224781930 is an apocalyptic number.

811224781930 is a deficient number, since it is larger than the sum of its proper divisors (648979825562).

811224781930 is a wasteful number, since it uses less digits than its factorization.

811224781930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81122478200.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 811224781930 in words is "eight hundred eleven billion, two hundred twenty-four million, seven hundred eighty-one thousand, nine hundred thirty".