8220470649 has 16 divisors (see below), whose sum is σ = 11802075840. Its totient is φ = 5070517760.

The previous prime is 8220470647. The next prime is 8220470659. The reversal of 8220470649 is 9460740228.

It is a cyclic number.

It is not a de Polignac number, because 8220470649 - 2¹ = 8220470647 is a prime.

It is a super-2 number, since 2×8220470649² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8220470649.

It is not an unprimeable number, because it can be changed into a prime (8220470647) 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, 1362972 + ... + 1368989.

It is an arithmetic number, because the mean of its divisors is an integer number (737629740).

Almost surely, 2^8220470649 is an apocalyptic number.

It is an amenable number.

8220470649 is a deficient number, since it is larger than the sum of its proper divisors (3581605191).

8220470649 is a wasteful number, since it uses less digits than its factorization.

8220470649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732040.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 8220470649 is about 90666.8111769682. The cubic root of 8220470649 is about 2018.2063162046.

The spelling of 8220470649 in words is "eight billion, two hundred twenty million, four hundred seventy thousand, six hundred forty-nine".