2615221845 has 48 divisors (see below), whose sum is σ = 4925606400. Its totient is φ = 1278737280.

The previous prime is 2615221841. The next prime is 2615221853. The reversal of 2615221845 is 5481225162.

2615221845 is a `hidden beast` number, since 2 + 615 + 22 + 18 + 4 + 5 = 666.

It is not a de Polignac number, because 2615221845 - 2² = 2615221841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2615221841) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 22830 + ... + 75839.

It is an arithmetic number, because the mean of its divisors is an integer number (102616800).

Almost surely, 2^2615221845 is an apocalyptic number.

It is an amenable number.

2615221845 is a deficient number, since it is larger than the sum of its proper divisors (2310384555).

2615221845 is a wasteful number, since it uses less digits than its factorization.

2615221845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98730 (or 98727 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 2615221845 is about 51139.2397772982. The cubic root of 2615221845 is about 1377.7471196508.

The spelling of 2615221845 in words is "two billion, six hundred fifteen million, two hundred twenty-one thousand, eight hundred forty-five".