56106566061551 has 4 divisors (see below), whose sum is σ = 56144450307504. Its totient is φ = 56068681815600.

The previous prime is 56106566061479. The next prime is 56106566061563. The reversal of 56106566061551 is 15516066560165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56106566061551 - 2¹⁸ = 56106565799407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56106566061493 and 56106566061502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56106566361551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18942120755 + ... + 18942123716.

It is an arithmetic number, because the mean of its divisors is an integer number (14036112576876).

Almost surely, 2^{56106566061551} is an apocalyptic number.

56106566061551 is a deficient number, since it is larger than the sum of its proper divisors (37884245953).

56106566061551 is a wasteful number, since it uses less digits than its factorization.

56106566061551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37884245952.

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 56106566061551 in words is "fifty-six trillion, one hundred six billion, five hundred sixty-six million, sixty-one thousand, five hundred fifty-one".