820245164011 has 16 divisors (see below), whose sum is σ = 1009562809024. Its totient is φ = 648965706624.

The previous prime is 820245164009. The next prime is 820245164021. The reversal of 820245164011 is 110461542028.

It is a cyclic number.

It is not a de Polignac number, because 820245164011 - 2¹ = 820245164009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (820245164021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3425641 + ... + 3657253.

It is an arithmetic number, because the mean of its divisors is an integer number (63097675564).

Almost surely, 2^820245164011 is an apocalyptic number.

820245164011 is a deficient number, since it is larger than the sum of its proper divisors (189317645013).

820245164011 is a wasteful number, since it uses less digits than its factorization.

820245164011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270550.

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 820245164011 in words is "eight hundred twenty billion, two hundred forty-five million, one hundred sixty-four thousand, eleven".