7215550570649 has 16 divisors (see below), whose sum is σ = 7540822493952. Its totient is φ = 6897451252608.

The previous prime is 7215550570639. The next prime is 7215550570661. The reversal of 7215550570649 is 9460750555127.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7215550570649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7215550570594 and 7215550570603.

It is not an unprimeable number, because it can be changed into a prime (7215550570639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46512677 + ... + 46667549.

It is an arithmetic number, because the mean of its divisors is an integer number (471301405872).

Almost surely, 2^{7215550570649} is an apocalyptic number.

It is an amenable number.

7215550570649 is a deficient number, since it is larger than the sum of its proper divisors (325271923303).

7215550570649 is a wasteful number, since it uses less digits than its factorization.

7215550570649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178016.

The product of its (nonzero) digits is 13230000, while the sum is 56.

The spelling of 7215550570649 in words is "seven trillion, two hundred fifteen billion, five hundred fifty million, five hundred seventy thousand, six hundred forty-nine".