2571878353445 has 8 divisors (see below), whose sum is σ = 3086273178744. Its totient is φ = 2057489913024.

The previous prime is 2571878353409. The next prime is 2571878353469. The reversal of 2571878353445 is 5443538781752.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1074255550369 + 1497622803076 = 1036463^2 + 1223774^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2571878353445 - 2¹² = 2571878349349 is a prime.

It is a super-2 number, since 2×2571878353445² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660134 + ... + 2362103.

It is an arithmetic number, because the mean of its divisors is an integer number (385784147343).

Almost surely, 2^{2571878353445} is an apocalyptic number.

It is an amenable number.

2571878353445 is a deficient number, since it is larger than the sum of its proper divisors (514394825299).

2571878353445 is a wasteful number, since it uses less digits than its factorization.

2571878353445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192439.

The product of its digits is 112896000, while the sum is 62.

The spelling of 2571878353445 in words is "two trillion, five hundred seventy-one billion, eight hundred seventy-eight million, three hundred fifty-three thousand, four hundred forty-five".