55556506782723 has 32 divisors (see below), whose sum is σ = 77621951877120. Its totient is φ = 35278012836000.

The previous prime is 55556506782709. The next prime is 55556506782817. The reversal of 55556506782723 is 32728760565555.

It is a happy number.

It is not a de Polignac number, because 55556506782723 - 2¹⁸ = 55556506520579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55556506732723) 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, 74777490 + ... + 75516792.

It is an arithmetic number, because the mean of its divisors is an integer number (2425685996160).

Almost surely, 2^{55556506782723} is an apocalyptic number.

55556506782723 is a deficient number, since it is larger than the sum of its proper divisors (22065445094397).

55556506782723 is a wasteful number, since it uses less digits than its factorization.

55556506782723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743919.

The product of its (nonzero) digits is 529200000, while the sum is 66.

The spelling of 55556506782723 in words is "fifty-five trillion, five hundred fifty-six billion, five hundred six million, seven hundred eighty-two thousand, seven hundred twenty-three".