56121817505422 has 16 divisors (see below), whose sum is σ = 84416209088832. Its totient is φ = 27983088574560.

The previous prime is 56121817505389. The next prime is 56121817505423. The reversal of 56121817505422 is 22450571812165.

It is a super-2 number, since 2×56121817505422² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56121817505423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13341172 + ... + 17036152.

It is an arithmetic number, because the mean of its divisors is an integer number (5276013068052).

Almost surely, 2^{56121817505422} is an apocalyptic number.

56121817505422 is a deficient number, since it is larger than the sum of its proper divisors (28294391583410).

56121817505422 is a wasteful number, since it uses less digits than its factorization.

56121817505422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716043.

The product of its (nonzero) digits is 1344000, while the sum is 49.

The spelling of 56121817505422 in words is "fifty-six trillion, one hundred twenty-one billion, eight hundred seventeen million, five hundred five thousand, four hundred twenty-two".