55785574123 has 16 divisors (see below), whose sum is σ = 59018532480. Its totient is φ = 52643074176.

The previous prime is 55785574121. The next prime is 55785574153. The reversal of 55785574123 is 32147558755.

It is not a de Polignac number, because 55785574123 - 2¹ = 55785574121 is a prime.

It is a super-2 number, since 2×55785574123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55785574121) 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, 971161 + ... + 1026997.

It is an arithmetic number, because the mean of its divisors is an integer number (3688658280).

Almost surely, 2^55785574123 is an apocalyptic number.

55785574123 is a deficient number, since it is larger than the sum of its proper divisors (3232958357).

55785574123 is a wasteful number, since it uses less digits than its factorization.

55785574123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56646.

The product of its digits is 5880000, while the sum is 52.

The spelling of 55785574123 in words is "fifty-five billion, seven hundred eighty-five million, five hundred seventy-four thousand, one hundred twenty-three".