56801645 has 8 divisors (see below), whose sum is σ = 68378904. Its totient is φ = 45296704.

The previous prime is 56801627. The next prime is 56801653. The reversal of 56801645 is 54610865.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 206116 + 56595529 = 454^2 + 7523^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56801645 is a prime.

It is a super-3 number, since 3×56801645³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16334 + ... + 19503.

It is an arithmetic number, because the mean of its divisors is an integer number (8547363).

Almost surely, 2^56801645 is an apocalyptic number.

It is an amenable number.

56801645 is a deficient number, since it is larger than the sum of its proper divisors (11577259).

56801645 is a wasteful number, since it uses less digits than its factorization.

56801645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36159.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 56801645 is about 7536.6866061951. The cubic root of 56801645 is about 384.4031794177.

The spelling of 56801645 in words is "fifty-six million, eight hundred one thousand, six hundred forty-five".