811557148 has 6 divisors (see below), whose sum is σ = 1420225016. Its totient is φ = 405778572.

The previous prime is 811557113. The next prime is 811557191. The reversal of 811557148 is 841755118.

It is a self number, because there is not a number n which added to its sum of digits gives 811557148.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101444640 + ... + 101444647.

Almost surely, 2^811557148 is an apocalyptic number.

It is an amenable number.

811557148 is a deficient number, since it is larger than the sum of its proper divisors (608667868).

811557148 is a wasteful number, since it uses less digits than its factorization.

811557148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202889291 (or 202889289 counting only the distinct ones).

The product of its digits is 44800, while the sum is 40.

The square root of 811557148 is about 28487.8421085206. The cubic root of 811557148 is about 932.7667053320.

The spelling of 811557148 in words is "eight hundred eleven million, five hundred fifty-seven thousand, one hundred forty-eight".