6540265448397 has 24 divisors (see below), whose sum is σ = 9753480009728. Its totient is φ = 4218796418400.

The previous prime is 6540265448389. The next prime is 6540265448413. The reversal of 6540265448397 is 7938445620456.

6540265448397 is a `hidden beast` number, since 6 + 5 + 4 + 0 + 2 + 6 + 544 + 83 + 9 + 7 = 666.

It is not a de Polignac number, because 6540265448397 - 2³ = 6540265448389 is a prime.

It is a super-2 number, since 2×6540265448397² (a number of 26 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540265448317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 408298 + ... + 3639675.

Almost surely, 2^{6540265448397} is an apocalyptic number.

It is an amenable number.

6540265448397 is a deficient number, since it is larger than the sum of its proper divisors (3213214561331).

6540265448397 is a wasteful number, since it uses less digits than its factorization.

6540265448397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053801 (or 4053798 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 63.

The spelling of 6540265448397 in words is "six trillion, five hundred forty billion, two hundred sixty-five million, four hundred forty-eight thousand, three hundred ninety-seven".