7206021649 has 8 divisors (see below), whose sum is σ = 7288250472. Its totient is φ = 7124006400.

The previous prime is 7206021631. The next prime is 7206021653. The reversal of 7206021649 is 9461206027.

It can be written as a sum of positive squares in 4 ways, for example, as 1898170624 + 5307851025 = 43568^2 + 72855^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7206021649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7206021629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14967 + ... + 120979.

It is an arithmetic number, because the mean of its divisors is an integer number (911031309).

Almost surely, 2^7206021649 is an apocalyptic number.

It is an amenable number.

7206021649 is a deficient number, since it is larger than the sum of its proper divisors (82228823).

7206021649 is a wasteful number, since it uses less digits than its factorization.

7206021649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106787.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 7206021649 is about 84888.2892335568. The cubic root of 7206021649 is about 1931.5169375592.

The spelling of 7206021649 in words is "seven billion, two hundred six million, twenty-one thousand, six hundred forty-nine".