502613781449 has 4 divisors (see below), whose sum is σ = 541276380036. Its totient is φ = 463951182864.

The previous prime is 502613781427. The next prime is 502613781463. The reversal of 502613781449 is 944187316205.

It is a happy number.

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 31321920400 + 471291861049 = 176980^2 + 686507^2 .

It is not a de Polignac number, because 502613781449 - 2²⁰ = 502612732873 is a prime.

It is a super-2 number, since 2×502613781449² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 502613781397 and 502613781406.

It is not an unprimeable number, because it can be changed into a prime (502613781419) 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, 19331299274 + ... + 19331299299.

It is an arithmetic number, because the mean of its divisors is an integer number (135319095009).

It is a 1-persistent number, because it is pandigital, but 2⋅502613781449 = 1005227562898 is not.

Almost surely, 2^502613781449 is an apocalyptic number.

It is an amenable number.

502613781449 is a deficient number, since it is larger than the sum of its proper divisors (38662598587).

502613781449 is a wasteful number, since it uses less digits than its factorization.

502613781449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38662598586.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 502613781449 in words is "five hundred two billion, six hundred thirteen million, seven hundred eighty-one thousand, four hundred forty-nine".