2780056078542 has 112 divisors (see below), whose sum is σ = 6370922294880. Its totient is φ = 909263900736.

The previous prime is 2780056078531. The next prime is 2780056078543. The reversal of 2780056078542 is 2458706500872.

2780056078542 is a `hidden beast` number, since 2 + 7 + 8 + 0 + 0 + 560 + 78 + 5 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780056078543) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 16284048 + ... + 16453884.

Almost surely, 2^{2780056078542} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2780056078542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3185461147440).

2780056078542 is an abundant number, since it is smaller than the sum of its proper divisors (3590866216338).

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

2780056078542 is a wasteful number, since it uses less digits than its factorization.

2780056078542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170069 (or 170054 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 2780056078542 in words is "two trillion, seven hundred eighty billion, fifty-six million, seventy-eight thousand, five hundred forty-two".