2555137856540 has 12 divisors (see below), whose sum is σ = 5365789498776. Its totient is φ = 1022055142608.

The previous prime is 2555137856533. The next prime is 2555137856543. The reversal of 2555137856540 is 456587315552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555137856543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63878446394 + ... + 63878446433.

It is an arithmetic number, because the mean of its divisors is an integer number (447149124898).

Almost surely, 2^{2555137856540} is an apocalyptic number.

2555137856540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2555137856540 is an abundant number, since it is smaller than the sum of its proper divisors (2810651642236).

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

2555137856540 is a wasteful number, since it uses less digits than its factorization.

2555137856540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127756892836 (or 127756892834 counting only the distinct ones).

The product of its (nonzero) digits is 25200000, while the sum is 56.

The spelling of 2555137856540 in words is "two trillion, five hundred fifty-five billion, one hundred thirty-seven million, eight hundred fifty-six thousand, five hundred forty".