56172531145 has 8 divisors (see below), whose sum is σ = 67414838400. Its totient is φ = 44932824240.

The previous prime is 56172531143. The next prime is 56172531167. The reversal of 56172531145 is 54113527165.

It is a happy number.

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

It is not a de Polignac number, because 56172531145 - 2¹ = 56172531143 is a prime.

It is a super-2 number, since 2×56172531145² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56172531098 and 56172531107.

It is not an unprimeable number, because it can be changed into a prime (56172531143) 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, 602241 + ... + 689230.

It is an arithmetic number, because the mean of its divisors is an integer number (8426854800).

Almost surely, 2^56172531145 is an apocalyptic number.

It is an amenable number.

56172531145 is a deficient number, since it is larger than the sum of its proper divisors (11242307255).

56172531145 is a wasteful number, since it uses less digits than its factorization.

56172531145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300175.

The product of its digits is 126000, while the sum is 40.

The spelling of 56172531145 in words is "fifty-six billion, one hundred seventy-two million, five hundred thirty-one thousand, one hundred forty-five".