56565166156565 has 32 divisors (see below), whose sum is σ = 74788877826432. Its totient is φ = 40727302560000.

The previous prime is 56565166156559. The next prime is 56565166156567.

It is a happy number.

56565166156565 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56565166156565 - 2⁴² = 52167119645461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56565166156495 and 56565166156504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56565166156567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61610330 + ... + 62521700.

It is an arithmetic number, because the mean of its divisors is an integer number (2337152432076).

Almost surely, 2^{56565166156565} is an apocalyptic number.

56565166156565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56565166156565 is a deficient number, since it is larger than the sum of its proper divisors (18223711669867).

56565166156565 is a wasteful number, since it uses less digits than its factorization.

56565166156565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922661.

The product of its digits is 729000000, while the sum is 68.

The spelling of 56565166156565 in words is "fifty-six trillion, five hundred sixty-five billion, one hundred sixty-six million, one hundred fifty-six thousand, five hundred sixty-five".