56897443671551 has 16 divisors (see below), whose sum is σ = 66500727383040. Its totient is φ = 47675153728800.

The previous prime is 56897443671533. The next prime is 56897443671559. The reversal of 56897443671551 is 15517634479865.

It is a cyclic number.

It is not a de Polignac number, because 56897443671551 - 2¹⁰ = 56897443670527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56897443671559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509294081 + ... + 509405786.

It is an arithmetic number, because the mean of its divisors is an integer number (4156295461440).

Almost surely, 2^{56897443671551} is an apocalyptic number.

56897443671551 is a deficient number, since it is larger than the sum of its proper divisors (9603283711489).

56897443671551 is a wasteful number, since it uses less digits than its factorization.

56897443671551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018700054.

The product of its digits is 762048000, while the sum is 71.

The spelling of 56897443671551 in words is "fifty-six trillion, eight hundred ninety-seven billion, four hundred forty-three million, six hundred seventy-one thousand, five hundred fifty-one".