811961652 has 24 divisors (see below), whose sum is σ = 1895059936. Its totient is φ = 270584928.

The previous prime is 811961629. The next prime is 811961659. The reversal of 811961652 is 256169118.

It is a super-3 number, since 3×811961652³ (a number of 28 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 811961652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811961659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66918 + ... + 78114.

Almost surely, 2^811961652 is an apocalyptic number.

It is an amenable number.

811961652 is an abundant number, since it is smaller than the sum of its proper divisors (1083098284).

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

811961652 is a wasteful number, since it uses less digits than its factorization.

811961652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17247 (or 17245 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 811961652 is about 28494.9408141165. The cubic root of 811961652 is about 932.9216523966.

The spelling of 811961652 in words is "eight hundred eleven million, nine hundred sixty-one thousand, six hundred fifty-two".