2781464781648 has 80 divisors (see below), whose sum is σ = 8568984692736. Its totient is φ = 760151863680.

The previous prime is 2781464781631. The next prime is 2781464781649. The reversal of 2781464781648 is 8461874641872.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781464781649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179952468 + ... + 179967923.

Almost surely, 2^{2781464781648} is an apocalyptic number.

2781464781648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2781464781648 is an abundant number, since it is smaller than the sum of its proper divisors (5787519911088).

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

2781464781648 is a wasteful number, since it uses less digits than its factorization.

2781464781648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359920432 (or 359920426 counting only the distinct ones).

The product of its digits is 115605504, while the sum is 66.

The spelling of 2781464781648 in words is "two trillion, seven hundred eighty-one billion, four hundred sixty-four million, seven hundred eighty-one thousand, six hundred forty-eight".