2572647981 has 8 divisors (see below), whose sum is σ = 3438753024. Its totient is φ = 1710820800.

The previous prime is 2572647953. The next prime is 2572647991. The reversal of 2572647981 is 1897462752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2572647981 - 2⁵ = 2572647949 is a prime.

It is a super-2 number, since 2×2572647981² = 13237035268286752722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2572647941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1068061 + ... + 1070466.

It is an arithmetic number, because the mean of its divisors is an integer number (429844128).

Almost surely, 2^2572647981 is an apocalyptic number.

It is an amenable number.

2572647981 is a deficient number, since it is larger than the sum of its proper divisors (866105043).

2572647981 is a wasteful number, since it uses less digits than its factorization.

2572647981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138931.

The product of its digits is 1693440, while the sum is 51.

The square root of 2572647981 is about 50721.2773991350. The cubic root of 2572647981 is about 1370.2299471946.

The spelling of 2572647981 in words is "two billion, five hundred seventy-two million, six hundred forty-seven thousand, nine hundred eighty-one".