2551204346605 has 16 divisors (see below), whose sum is σ = 3107222722944. Its totient is φ = 2010446792640.

The previous prime is 2551204346591. The next prime is 2551204346641. The reversal of 2551204346605 is 5066434021552.

It is not a de Polignac number, because 2551204346605 - 2²³ = 2551195957997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16008415 + ... + 16166995.

It is an arithmetic number, because the mean of its divisors is an integer number (194201420184).

Almost surely, 2^{2551204346605} is an apocalyptic number.

It is an amenable number.

2551204346605 is a deficient number, since it is larger than the sum of its proper divisors (556018376339).

2551204346605 is a wasteful number, since it uses less digits than its factorization.

2551204346605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206676.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 2551204346605 in words is "two trillion, five hundred fifty-one billion, two hundred four million, three hundred forty-six thousand, six hundred five".