2215767645 has 96 divisors (see below), whose sum is σ = 4794177024. Its totient is φ = 921715200.

The previous prime is 2215767643. The next prime is 2215767647. The reversal of 2215767645 is 5467675122.

2215767645 is a `hidden beast` number, since 2 + 2 + 1 + 576 + 76 + 4 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (2215767643) and next prime (2215767647).

It is not a de Polignac number, because 2215767645 - 2¹ = 2215767643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2215767645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215767643) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 286935 + ... + 294555.

It is an arithmetic number, because the mean of its divisors is an integer number (49939344).

Almost surely, 2^2215767645 is an apocalyptic number.

It is an amenable number.

2215767645 is an abundant number, since it is smaller than the sum of its proper divisors (2578409379).

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

2215767645 is a wasteful number, since it uses less digits than its factorization.

2215767645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7723 (or 7720 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 2215767645 is about 47071.9411645621. The cubic root of 2215767645 is about 1303.6912143903.

The spelling of 2215767645 in words is "two billion, two hundred fifteen million, seven hundred sixty-seven thousand, six hundred forty-five".