5181806356 has 6 divisors (see below), whose sum is σ = 9068161130. Its totient is φ = 2590903176.

The previous prime is 5181806347. The next prime is 5181806401. The reversal of 5181806356 is 6536081815.

It can be written as a sum of positive squares in only one way, i.e., 4951373956 + 230432400 = 70366^2 + 15180^2 .

It is a super-2 number, since 2×5181806356² = 53702234222163997472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647725791 + ... + 647725798.

Almost surely, 2^5181806356 is an apocalyptic number.

It is an amenable number.

5181806356 is a deficient number, since it is larger than the sum of its proper divisors (3886354774).

5181806356 is a wasteful number, since it uses less digits than its factorization.

5181806356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295451593 (or 1295451591 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 5181806356 is about 71984.7647492162. The cubic root of 5181806356 is about 1730.4553309368.

The spelling of 5181806356 in words is "five billion, one hundred eighty-one million, eight hundred six thousand, three hundred fifty-six".