2781807081048 has 24 divisors (see below), whose sum is σ = 7534060844700. Its totient is φ = 927269026992.

The previous prime is 2781807080953. The next prime is 2781807081049. The reversal of 2781807081048 is 8401807081872.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 2781807080985 and 2781807081003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781807081049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19318104658 + ... + 19318104801.

Almost surely, 2^{2781807081048} is an apocalyptic number.

It is an amenable number.

2781807081048 is an abundant number, since it is smaller than the sum of its proper divisors (4752253763652).

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

2781807081048 is a wasteful number, since it uses less digits than its factorization.

2781807081048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38636209471 (or 38636209464 counting only the distinct ones).

The product of its (nonzero) digits is 1605632, while the sum is 54.

The spelling of 2781807081048 in words is "two trillion, seven hundred eighty-one billion, eight hundred seven million, eighty-one thousand, forty-eight".