2551535555040 has 144 divisors (see below), whose sum is σ = 9085685420448. Its totient is φ = 650826451968.

The previous prime is 2551535554973. The next prime is 2551535555077. The reversal of 2551535555040 is 405555351552.

2551535555040 is a `hidden beast` number, since 2 + 5 + 5 + 1 + 5 + 3 + 55 + 550 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 38486439 + ... + 38552678.

It is an arithmetic number, because the mean of its divisors is an integer number (63095037642).

Almost surely, 2^{2551535555040} is an apocalyptic number.

2551535555040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551535555040 is an abundant number, since it is smaller than the sum of its proper divisors (6534149865408).

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

2551535555040 is a wasteful number, since it uses less digits than its factorization.

2551535555040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77039161 (or 77039150 counting only the distinct ones).

The product of its (nonzero) digits is 1875000, while the sum is 45.

The spelling of 2551535555040 in words is "two trillion, five hundred fifty-one billion, five hundred thirty-five million, five hundred fifty-five thousand, forty".