5278661512 has 16 divisors (see below), whose sum is σ = 9969736860. Its totient is φ = 2620065024.

The previous prime is 5278661497. The next prime is 5278661533. The reversal of 5278661512 is 2151668725.

It can be written as a sum of positive squares in 2 ways, for example, as 4739771716 + 538889796 = 68846^2 + 23214^2 .

It is a super-2 number, since 2×5278661512² = 55728534716540252288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2407053 + ... + 2409244.

Almost surely, 2^5278661512 is an apocalyptic number.

It is an amenable number.

5278661512 is a deficient number, since it is larger than the sum of its proper divisors (4691075348).

5278661512 is a wasteful number, since it uses less digits than its factorization.

5278661512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4816440 (or 4816436 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 5278661512 is about 72654.3977471426. The cubic root of 5278661512 is about 1741.1703835879.

The spelling of 5278661512 in words is "five billion, two hundred seventy-eight million, six hundred sixty-one thousand, five hundred twelve".