2115680404 has 6 divisors (see below), whose sum is σ = 3702440714. Its totient is φ = 1057840200.

The previous prime is 2115680327. The next prime is 2115680407. The reversal of 2115680404 is 4040865112.

It can be written as a sum of positive squares in only one way, i.e., 1536796804 + 578883600 = 39202^2 + 24060^2 .

It is a super-2 number, since 2×2115680404² = 8952207143739206432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115680407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264460047 + ... + 264460054.

Almost surely, 2^2115680404 is an apocalyptic number.

It is an amenable number.

2115680404 is a deficient number, since it is larger than the sum of its proper divisors (1586760310).

2115680404 is a wasteful number, since it uses less digits than its factorization.

2115680404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528920105 (or 528920103 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 2115680404 is about 45996.5259992535. The cubic root of 2115680404 is about 1283.7585660642.

The spelling of 2115680404 in words is "two billion, one hundred fifteen million, six hundred eighty thousand, four hundred four".