1556122403623 has 8 divisors (see below), whose sum is σ = 1557157693520. Its totient is φ = 1555087464000.

The previous prime is 1556122403579. The next prime is 1556122403707. The reversal of 1556122403623 is 3263042216551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1556122403623 - 2⁹ = 1556122403111 is a prime.

It is a super-2 number, since 2×1556122403623² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556122403723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9119533 + ... + 9288601.

It is an arithmetic number, because the mean of its divisors is an integer number (194644711690).

Almost surely, 2^{1556122403623} is an apocalyptic number.

1556122403623 is a deficient number, since it is larger than the sum of its proper divisors (1035289897).

1556122403623 is a wasteful number, since it uses less digits than its factorization.

1556122403623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175137.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 1556122403623 in words is "one trillion, five hundred fifty-six billion, one hundred twenty-two million, four hundred three thousand, six hundred twenty-three".