2115715645 has 16 divisors (see below), whose sum is σ = 2674333440. Its totient is φ = 1602379584.

The previous prime is 2115715543. The next prime is 2115715673. The reversal of 2115715645 is 5465175112.

It is a cyclic number.

It is not a de Polignac number, because 2115715645 - 2¹⁷ = 2115584573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146332 + ... + 160138.

It is an arithmetic number, because the mean of its divisors is an integer number (167145840).

Almost surely, 2^2115715645 is an apocalyptic number.

It is an amenable number.

2115715645 is a deficient number, since it is larger than the sum of its proper divisors (558617795).

2115715645 is a wasteful number, since it uses less digits than its factorization.

2115715645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15444.

The product of its digits is 42000, while the sum is 37.

The square root of 2115715645 is about 45996.9090809372. The cubic root of 2115715645 is about 1283.7656939027.

The spelling of 2115715645 in words is "two billion, one hundred fifteen million, seven hundred fifteen thousand, six hundred forty-five".