2781064416 has 48 divisors (see below), whose sum is σ = 7861858704. Its totient is φ = 855711744.

The previous prime is 2781064397. The next prime is 2781064421. The reversal of 2781064416 is 6144601872.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112961 + ... + 1115456.

It is an arithmetic number, because the mean of its divisors is an integer number (163788723).

Almost surely, 2^2781064416 is an apocalyptic number.

2781064416 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2781064416 is an abundant number, since it is smaller than the sum of its proper divisors (5080794288).

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

2781064416 is a wasteful number, since it uses less digits than its factorization.

2781064416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228443 (or 2228435 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 2781064416 is about 52735.7982399053. The cubic root of 2781064416 is about 1406.2753019290.

The spelling of 2781064416 in words is "two billion, seven hundred eighty-one million, sixty-four thousand, four hundred sixteen".