2971769856 has 88 divisors (see below), whose sum is σ = 8641025664. Its totient is φ = 900526080.

The previous prime is 2971769851. The next prime is 2971769893. The reversal of 2971769856 is 6589671792.

It is a tau number, because it is divible by the number of its divisors (88).

It is a self number, because there is not a number n which added to its sum of digits gives 2971769856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2971769851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10180 + ... + 77763.

Almost surely, 2^2971769856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2971769856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4320512832).

2971769856 is an abundant number, since it is smaller than the sum of its proper divisors (5669255808).

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

2971769856 is a wasteful number, since it uses less digits than its factorization.

2971769856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87977 (or 87959 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 60.

The square root of 2971769856 is about 54513.9418497690. The cubic root of 2971769856 is about 1437.7114264546.

The spelling of 2971769856 in words is "two billion, nine hundred seventy-one million, seven hundred sixty-nine thousand, eight hundred fifty-six".