6549901497 has 12 divisors (see below), whose sum is σ = 9469514340. Its totient is φ = 4362656928.

The previous prime is 6549901493. The next prime is 6549901499. The reversal of 6549901497 is 7941099456.

It is a happy number.

6549901497 is a `hidden beast` number, since 6 + 5 + 499 + 0 + 149 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 664556841 + 5885344656 = 25779^2 + 76716^2 .

It is not a de Polignac number, because 6549901497 - 2² = 6549901493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6549901493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318138 + ... + 338099.

It is an arithmetic number, because the mean of its divisors is an integer number (789126195).

Almost surely, 2^6549901497 is an apocalyptic number.

It is an amenable number.

6549901497 is a deficient number, since it is larger than the sum of its proper divisors (2919612843).

6549901497 is a wasteful number, since it uses less digits than its factorization.

6549901497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657352 (or 657349 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 6549901497 is about 80931.4617253389. The cubic root of 6549901497 is about 1871.0192520855.

The spelling of 6549901497 in words is "six billion, five hundred forty-nine million, nine hundred one thousand, four hundred ninety-seven".