264121115516 has 6 divisors (see below), whose sum is σ = 462211952160. Its totient is φ = 132060557756.

The previous prime is 264121115513. The next prime is 264121115539. The reversal of 264121115516 is 615511121462.

It is a super-2 number, since 2×264121115516² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264121115513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33015139436 + ... + 33015139443.

It is an arithmetic number, because the mean of its divisors is an integer number (77035325360).

Almost surely, 2^264121115516 is an apocalyptic number.

It is an amenable number.

264121115516 is a deficient number, since it is larger than the sum of its proper divisors (198090836644).

264121115516 is a wasteful number, since it uses less digits than its factorization.

264121115516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66030278883 (or 66030278881 counting only the distinct ones).

The product of its digits is 14400, while the sum is 35.

Adding to 264121115516 its reverse (615511121462), we get a palindrome (879632236978).

The spelling of 264121115516 in words is "two hundred sixty-four billion, one hundred twenty-one million, one hundred fifteen thousand, five hundred sixteen".