511107216081 has 64 divisors (see below), whose sum is σ = 891418755072. Its totient is φ = 252732960000.

The previous prime is 511107216073. The next prime is 511107216083. The reversal of 511107216081 is 180612701115.

It is not a de Polignac number, because 511107216081 - 2³ = 511107216073 is a prime.

It is a super-2 number, since 2×511107216081² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (511107216083) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 148210 + ... + 1021851.

It is an arithmetic number, because the mean of its divisors is an integer number (13928418048).

Almost surely, 2^511107216081 is an apocalyptic number.

It is an amenable number.

511107216081 is a deficient number, since it is larger than the sum of its proper divisors (380311538991).

511107216081 is a wasteful number, since it uses less digits than its factorization.

511107216081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170174.

The product of its (nonzero) digits is 3360, while the sum is 33.

Adding to 511107216081 its reverse (180612701115), we get a palindrome (691719917196).

The spelling of 511107216081 in words is "five hundred eleven billion, one hundred seven million, two hundred sixteen thousand, eighty-one".