2540172798 has 112 divisors (see below), whose sum is σ = 6038816256. Its totient is φ = 799742160.

The previous prime is 2540172787. The next prime is 2540172799. The reversal of 2540172798 is 8972710452.

It is a happy number.

2540172798 is a `hidden beast` number, since 2 + 540 + 17 + 2 + 7 + 98 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540172799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1942861 + ... + 1944167.

Almost surely, 2^2540172798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2540172798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3019408128).

2540172798 is an abundant number, since it is smaller than the sum of its proper divisors (3498643458).

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

2540172798 is a wasteful number, since it uses less digits than its factorization.

2540172798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401 (or 1386 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 2540172798 is about 50400.1269641258. The cubic root of 2540172798 is about 1364.4399296311.

The spelling of 2540172798 in words is "two billion, five hundred forty million, one hundred seventy-two thousand, seven hundred ninety-eight".