7156144836 has 81 divisors (see below), whose sum is σ = 18940721709. Its totient is φ = 2277947232.

The previous prime is 7156144829. The next prime is 7156144841. The reversal of 7156144836 is 6384416517.

The square root of 7156144836 is 84594.

It is a perfect power (a square), and thus also a powerful number.

7156144836 is a `hidden beast` number, since 7 + 1 + 561 + 4 + 4 + 83 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23328900 + 7132815936 = 4830^2 + 84456^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7156144791 and 7156144800.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11673666 + ... + 11674278.

Almost surely, 2^7156144836 is an apocalyptic number.

7156144836 is the 84594-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7156144836

7156144836 is an abundant number, since it is smaller than the sum of its proper divisors (11784576873).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7156144836 is a wasteful number, since it uses less digits than its factorization.

7156144836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282 (or 641 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The cubic root of 7156144836 is about 1927.0502548522.

The spelling of 7156144836 in words is "seven billion, one hundred fifty-six million, one hundred forty-four thousand, eight hundred thirty-six".