2811970656 has 72 divisors (see below), whose sum is σ = 8723509704. Its totient is φ = 852111360.

The previous prime is 2811970649. The next prime is 2811970657. The reversal of 2811970656 is 6560791182.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2811970657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 440641 + ... + 446976.

It is an arithmetic number, because the mean of its divisors is an integer number (121159857).

Almost surely, 2^2811970656 is an apocalyptic number.

It is an amenable number.

2811970656 is an abundant number, since it is smaller than the sum of its proper divisors (5911539048).

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

2811970656 is a wasteful number, since it uses less digits than its factorization.

2811970656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887644 (or 887633 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 2811970656 is about 53028.0176510493. The cubic root of 2811970656 is about 1411.4654810051.

The spelling of 2811970656 in words is "two billion, eight hundred eleven million, nine hundred seventy thousand, six hundred fifty-six".