55565808783406 has 32 divisors (see below), whose sum is σ = 88040048025600. Its totient is φ = 26260873863840.

The previous prime is 55565808783391. The next prime is 55565808783409. The reversal of 55565808783406 is 60438780856555.

It is a super-3 number, since 3×55565808783406³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55565808783409) 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, 150388500 + ... + 150757528.

It is an arithmetic number, because the mean of its divisors is an integer number (2751251500800).

Almost surely, 2^{55565808783406} is an apocalyptic number.

55565808783406 is a deficient number, since it is larger than the sum of its proper divisors (32474239242194).

55565808783406 is a wasteful number, since it uses less digits than its factorization.

55565808783406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425584.

The product of its (nonzero) digits is 967680000, while the sum is 70.

The spelling of 55565808783406 in words is "fifty-five trillion, five hundred sixty-five billion, eight hundred eight million, seven hundred eighty-three thousand, four hundred six".