2542781660 has 12 divisors (see below), whose sum is σ = 5339841528. Its totient is φ = 1017112656.

The previous prime is 2542781623. The next prime is 2542781669. The reversal of 2542781660 is 661872452.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542781669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63569522 + ... + 63569561.

It is an arithmetic number, because the mean of its divisors is an integer number (444986794).

Almost surely, 2^2542781660 is an apocalyptic number.

2542781660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2542781660 is an abundant number, since it is smaller than the sum of its proper divisors (2797059868).

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

2542781660 is a wasteful number, since it uses less digits than its factorization.

2542781660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127139092 (or 127139090 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 2542781660 is about 50426.0018244556. The cubic root of 2542781660 is about 1364.9068817942.

The spelling of 2542781660 in words is "two billion, five hundred forty-two million, seven hundred eighty-one thousand, six hundred sixty".