57026378021 has 4 divisors (see below), whose sum is σ = 57029275200. Its totient is φ = 57023480844.

The previous prime is 57026377999. The next prime is 57026378027. The reversal of 57026378021 is 12087362075.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57026378021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 57026378021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57026378027) 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 3 ways as a sum of consecutive naturals, for example, 1418861 + ... + 1458498.

It is an arithmetic number, because the mean of its divisors is an integer number (14257318800).

Almost surely, 2^57026378021 is an apocalyptic number.

It is an amenable number.

57026378021 is a deficient number, since it is larger than the sum of its proper divisors (2897179).

57026378021 is a wasteful number, since it uses less digits than its factorization.

57026378021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897178.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 57026378021 in words is "fifty-seven billion, twenty-six million, three hundred seventy-eight thousand, twenty-one".