2973561816 has 16 divisors (see below), whose sum is σ = 7433904600. Its totient is φ = 991187264.

The previous prime is 2973561797. The next prime is 2973561853. The reversal of 2973561816 is 6181653792.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61949181 + ... + 61949228.

Almost surely, 2^2973561816 is an apocalyptic number.

It is an amenable number.

2973561816 is an abundant number, since it is smaller than the sum of its proper divisors (4460342784).

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

2973561816 is a wasteful number, since it uses less digits than its factorization.

2973561816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123898418 (or 123898414 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 2973561816 is about 54530.3751683408. The cubic root of 2973561816 is about 1438.0003456095. Note that the first 3 decimals are identical.

The spelling of 2973561816 in words is "two billion, nine hundred seventy-three million, five hundred sixty-one thousand, eight hundred sixteen".