553640405 has 8 divisors (see below), whose sum is σ = 664631352. Its totient is φ = 442737088.

The previous prime is 553640389. The next prime is 553640407. The reversal of 553640405 is 504046355.

It can be written as a sum of positive squares in 4 ways, for example, as 73942801 + 479697604 = 8599^2 + 21902^2 .

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 553640405 - 2⁴ = 553640389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553640407) 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, 7094 + ... + 34023.

It is an arithmetic number, because the mean of its divisors is an integer number (83078919).

Almost surely, 2^553640405 is an apocalyptic number.

It is an amenable number.

553640405 is a deficient number, since it is larger than the sum of its proper divisors (110990947).

553640405 is a wasteful number, since it uses less digits than its factorization.

553640405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43815.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 553640405 is about 23529.5644881073. The cubic root of 553640405 is about 821.1249704058.

The spelling of 553640405 in words is "five hundred fifty-three million, six hundred forty thousand, four hundred five".