5781169156 has 27 divisors (see below), whose sum is σ = 11770976007. Its totient is φ = 2477187720.

The previous prime is 5781169133. The next prime is 5781169181. The reversal of 5781169156 is 6519611875.

It is a happy number.

The square root of 5781169156 is 76034.

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

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1061761 + ... + 1067191.

Almost surely, 2^5781169156 is an apocalyptic number.

5781169156 is the 76034-th square number.

It is an amenable number.

5781169156 is an abundant number, since it is smaller than the sum of its proper divisors (5989806851).

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

5781169156 is an frugal number, since it uses more digits than its factorization.

5781169156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10880 (or 5440 counting only the distinct ones).

The product of its digits is 453600, while the sum is 49.

The cubic root of 5781169156 is about 1794.7552220902.

Multiplying 5781169156 by its sum of digits (49), we get a square (283277288644 = 532238²).

5781169156 divided by its sum of digits (49) gives a square (117983044 = 10862²).

The spelling of 5781169156 in words is "five billion, seven hundred eighty-one million, one hundred sixty-nine thousand, one hundred fifty-six".