2681542840 has 32 divisors (see below), whose sum is σ = 6042444480. Its totient is φ = 1071021952.

The previous prime is 2681542819. The next prime is 2681542849. The reversal of 2681542840 is 482451862.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2681542793 and 2681542802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2681542849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22432 + ... + 76591.

It is an arithmetic number, because the mean of its divisors is an integer number (188826390).

Almost surely, 2^2681542840 is an apocalyptic number.

2681542840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2681542840 is an abundant number, since it is smaller than the sum of its proper divisors (3360901640).

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

2681542840 is a wasteful number, since it uses less digits than its factorization.

2681542840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99711 (or 99707 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 2681542840 is about 51783.6155555017. The cubic root of 2681542840 is about 1389.2964090939.

The spelling of 2681542840 in words is "two billion, six hundred eighty-one million, five hundred forty-two thousand, eight hundred forty".