2581651397677 has 16 divisors (see below), whose sum is σ = 2839387763520. Its totient is φ = 2327819929600.

The previous prime is 2581651397609. The next prime is 2581651397683. The reversal of 2581651397677 is 7767931561852.

It is not a de Polignac number, because 2581651397677 - 2¹¹ = 2581651395629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581651397077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821524 + ... + 2416237.

It is an arithmetic number, because the mean of its divisors is an integer number (177461735220).

Almost surely, 2^{2581651397677} is an apocalyptic number.

It is an amenable number.

2581651397677 is a deficient number, since it is larger than the sum of its proper divisors (257736365843).

2581651397677 is a wasteful number, since it uses less digits than its factorization.

2581651397677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238364.

The product of its digits is 133358400, while the sum is 67.

The spelling of 2581651397677 in words is "two trillion, five hundred eighty-one billion, six hundred fifty-one million, three hundred ninety-seven thousand, six hundred seventy-seven".