2781940064859 has 16 divisors (see below), whose sum is σ = 4363827553440. Its totient is φ = 1745531020800.

The previous prime is 2781940064807. The next prime is 2781940064861. The reversal of 2781940064859 is 9584600491872.

It is not a de Polignac number, because 2781940064859 - 2⁷ = 2781940064731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2781940064796 and 2781940064805.

It is not an unprimeable number, because it can be changed into a prime (2781940064899) 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, 3030435342 + ... + 3030436259.

It is an arithmetic number, because the mean of its divisors is an integer number (272739222090).

Almost surely, 2^{2781940064859} is an apocalyptic number.

2781940064859 is a deficient number, since it is larger than the sum of its proper divisors (1581887488581).

2781940064859 is a wasteful number, since it uses less digits than its factorization.

2781940064859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060871627 (or 6060871621 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 2781940064859 in words is "two trillion, seven hundred eighty-one billion, nine hundred forty million, sixty-four thousand, eight hundred fifty-nine".