511315116720 has 80 divisors (see below), whose sum is σ = 1585348174080. Its totient is φ = 136327359232.

The previous prime is 511315116679. The next prime is 511315116733. The reversal of 511315116720 is 27611513115.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×511315116720² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1245997 + ... + 1604723.

It is an arithmetic number, because the mean of its divisors is an integer number (19816852176).

Almost surely, 2^511315116720 is an apocalyptic number.

It is an amenable number.

511315116720 is an abundant number, since it is smaller than the sum of its proper divisors (1074033057360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

511315116720 is a wasteful number, since it uses less digits than its factorization.

511315116720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364682 (or 364676 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 33.

Adding to 511315116720 its reverse (27611513115), we get a palindrome (538926629835).

The spelling of 511315116720 in words is "five hundred eleven billion, three hundred fifteen million, one hundred sixteen thousand, seven hundred twenty".