511148474813 has 4 divisors (see below), whose sum is σ = 533372321568. Its totient is φ = 488924628060.

The previous prime is 511148474779. The next prime is 511148474827. The reversal of 511148474813 is 318474841115.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 511148474813 - 2²² = 511144280509 is a prime.

It is a super-2 number, since 2×511148474813² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511148474113) 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, 11111923343 + ... + 11111923388.

It is an arithmetic number, because the mean of its divisors is an integer number (133343080392).

Almost surely, 2^511148474813 is an apocalyptic number.

It is an amenable number.

511148474813 is a deficient number, since it is larger than the sum of its proper divisors (22223846755).

511148474813 is a wasteful number, since it uses less digits than its factorization.

511148474813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22223846754.

The product of its digits is 430080, while the sum is 47.

The spelling of 511148474813 in words is "five hundred eleven billion, one hundred forty-eight million, four hundred seventy-four thousand, eight hundred thirteen".