811207728051 has 8 divisors (see below), whose sum is σ = 1236126061824. Its totient is φ = 463547273160.

The previous prime is 811207728029. The next prime is 811207728059. The reversal of 811207728051 is 150827702118.

It is a happy number.

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

It is not a de Polignac number, because 811207728051 - 2¹³ = 811207719859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 811207727994 and 811207728012.

It is not an unprimeable number, because it can be changed into a prime (811207728059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19314469695 + ... + 19314469736.

It is an arithmetic number, because the mean of its divisors is an integer number (154515757728).

Almost surely, 2^811207728051 is an apocalyptic number.

811207728051 is a deficient number, since it is larger than the sum of its proper divisors (424918333773).

811207728051 is a wasteful number, since it uses less digits than its factorization.

811207728051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38628939441.

The product of its (nonzero) digits is 62720, while the sum is 42.

The spelling of 811207728051 in words is "eight hundred eleven billion, two hundred seven million, seven hundred twenty-eight thousand, fifty-one".