56436665 has 8 divisors (see below), whose sum is σ = 68652168. Its totient is φ = 44530560.

The previous prime is 56436661. The next prime is 56436671. The reversal of 56436665 is 56663465.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15745024 + 40691641 = 3968^2 + 6379^2 .

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

It is not a de Polignac number, because 56436665 - 2² = 56436661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56436661) 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, 76946 + ... + 77675.

It is an arithmetic number, because the mean of its divisors is an integer number (8581521).

Almost surely, 2^56436665 is an apocalyptic number.

It is an amenable number.

56436665 is a deficient number, since it is larger than the sum of its proper divisors (12215503).

56436665 is a wasteful number, since it uses less digits than its factorization.

56436665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154699.

The product of its digits is 388800, while the sum is 41.

The square root of 56436665 is about 7512.4340263326. The cubic root of 56436665 is about 383.5780797886.

The spelling of 56436665 in words is "fifty-six million, four hundred thirty-six thousand, six hundred sixty-five".