2544653997 has 6 divisors (see below), whose sum is σ = 3675611342. Its totient is φ = 1696435992.

The previous prime is 2544653977. The next prime is 2544653999. The reversal of 2544653997 is 7993564452.

2544653997 is a `hidden beast` number, since 2 + 544 + 6 + 5 + 3 + 9 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2458275561 + 86378436 = 49581^2 + 9294^2 .

It is not a de Polignac number, because 2544653997 - 2¹⁵ = 2544621229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2544653999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141369658 + ... + 141369675.

Almost surely, 2^2544653997 is an apocalyptic number.

It is an amenable number.

2544653997 is a deficient number, since it is larger than the sum of its proper divisors (1130957345).

2544653997 is a wasteful number, since it uses less digits than its factorization.

2544653997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282739339 (or 282739336 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 54.

The square root of 2544653997 is about 50444.5636020374. The cubic root of 2544653997 is about 1365.2418087894.

The spelling of 2544653997 in words is "two billion, five hundred forty-four million, six hundred fifty-three thousand, nine hundred ninety-seven".