2781557255600 has 60 divisors (see below), whose sum is σ = 6682940894616. Its totient is φ = 1112581347840.

The previous prime is 2781557255597. The next prime is 2781557255669. The reversal of 2781557255600 is 65527551872.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12010499 + ... + 12239901.

Almost surely, 2^{2781557255600} is an apocalyptic number.

2781557255600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2781557255600 is an abundant number, since it is smaller than the sum of its proper divisors (3901383639016).

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

2781557255600 is a wasteful number, since it uses less digits than its factorization.

2781557255600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259734 (or 259723 counting only the distinct ones).

The product of its (nonzero) digits is 5880000, while the sum is 53.

The spelling of 2781557255600 in words is "two trillion, seven hundred eighty-one billion, five hundred fifty-seven million, two hundred fifty-five thousand, six hundred".