2115662643 has 12 divisors (see below), whose sum is σ = 3059413968. Its totient is φ = 1408846320.

The previous prime is 2115662587. The next prime is 2115662663. The reversal of 2115662643 is 3462665112.

2115662643 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 6 + 6 + 2 + 643 = 666.

It is not a de Polignac number, because 2115662643 - 2⁶ = 2115662579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2115662598 and 2115662607.

It is not an unprimeable number, because it can be changed into a prime (2115662663) 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, 124528 + ... + 140493.

It is an arithmetic number, because the mean of its divisors is an integer number (254951164).

Almost surely, 2^2115662643 is an apocalyptic number.

2115662643 is a deficient number, since it is larger than the sum of its proper divisors (943751325).

2115662643 is a wasteful number, since it uses less digits than its factorization.

2115662643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265914 (or 265911 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2115662643 is about 45996.3329299195. The cubic root of 2115662643 is about 1283.7549736975.

The spelling of 2115662643 in words is "two billion, one hundred fifteen million, six hundred sixty-two thousand, six hundred forty-three".