5281661536 has 24 divisors (see below), whose sum is σ = 10413673200. Its totient is φ = 2636919168.

The previous prime is 5281661521. The next prime is 5281661551. The reversal of 5281661536 is 6351661825.

It is an interprime number because it is at equal distance from previous prime (5281661521) and next prime (5281661551).

It is a junction number, because it is equal to n+sod(n) for n = 5281661492 and 5281661501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100236 + ... + 143563.

It is an arithmetic number, because the mean of its divisors is an integer number (433903050).

Almost surely, 2^5281661536 is an apocalyptic number.

It is an amenable number.

5281661536 is a deficient number, since it is larger than the sum of its proper divisors (5132011664).

5281661536 is a wasteful number, since it uses less digits than its factorization.

5281661536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244486 (or 244478 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The square root of 5281661536 is about 72675.0406673433. The cubic root of 5281661536 is about 1741.5001744937.

The spelling of 5281661536 in words is "five billion, two hundred eighty-one million, six hundred sixty-one thousand, five hundred thirty-six".