515113385797 has 4 divisors (see below), whose sum is σ = 527677126956. Its totient is φ = 502549644640.

The previous prime is 515113385719. The next prime is 515113385821. The reversal of 515113385797 is 797583311515.

It is a Cunningham number, because it is equal to 717714²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24820742116 + 490292643681 = 157546^2 + 700209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515113385797 is a prime.

It is a super-3 number, since 3×515113385797³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515113386797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6281870518 + ... + 6281870599.

It is an arithmetic number, because the mean of its divisors is an integer number (131919281739).

Almost surely, 2^515113385797 is an apocalyptic number.

It is an amenable number.

515113385797 is a deficient number, since it is larger than the sum of its proper divisors (12563741159).

515113385797 is a wasteful number, since it uses less digits than its factorization.

515113385797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12563741158.

The product of its digits is 3969000, while the sum is 55.

The spelling of 515113385797 in words is "five hundred fifteen billion, one hundred thirteen million, three hundred eighty-five thousand, seven hundred ninety-seven".