2551205020554 has 96 divisors (see below), whose sum is σ = 6051293211600. Its totient is φ = 773519210496.

The previous prime is 2551205020547. The next prime is 2551205020597. The reversal of 2551205020554 is 4550205021552.

2551205020554 is a `hidden beast` number, since 2 + 5 + 51 + 2 + 0 + 50 + 2 + 0 + 554 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1906760531025 + 644444489529 = 1380855^2 + 802773^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 930832 + ... + 2443124.

Almost surely, 2^{2551205020554} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2551205020554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3025646605800).

2551205020554 is an abundant number, since it is smaller than the sum of its proper divisors (3500088191046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2551205020554 is a wasteful number, since it uses less digits than its factorization.

2551205020554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512504 (or 1512501 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The spelling of 2551205020554 in words is "two trillion, five hundred fifty-one billion, two hundred five million, twenty thousand, five hundred fifty-four".