56545051266 has 128 divisors (see below), whose sum is σ = 142106400000. Its totient is φ = 16508943360.

The previous prime is 56545051223. The next prime is 56545051291. The reversal of 56545051266 is 66215054565.

56545051266 is a `hidden beast` number, since 56 + 545 + 0 + 51 + 2 + 6 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8764810 + ... + 8771258.

It is an arithmetic number, because the mean of its divisors is an integer number (1110206250).

Almost surely, 2^56545051266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56545051266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71053200000).

56545051266 is an abundant number, since it is smaller than the sum of its proper divisors (85561348734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56545051266 is a wasteful number, since it uses less digits than its factorization.

56545051266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7009 (or 7003 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 56545051266 in words is "fifty-six billion, five hundred forty-five million, fifty-one thousand, two hundred sixty-six".