3581407645 has 8 divisors (see below), whose sum is σ = 4301904600. Its totient is φ = 2862315840.

The previous prime is 3581407639. The next prime is 3581407691. The reversal of 3581407645 is 5467041853.

It can be written as a sum of positive squares in 4 ways, for example, as 72267001 + 3509140644 = 8501^2 + 59238^2 .

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

It is not a de Polignac number, because 3581407645 - 2⁹ = 3581407133 is a prime.

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, 345670 + ... + 355879.

It is an arithmetic number, because the mean of its divisors is an integer number (537738075).

Almost surely, 2^3581407645 is an apocalyptic number.

It is an amenable number.

3581407645 is a deficient number, since it is larger than the sum of its proper divisors (720496955).

3581407645 is a wasteful number, since it uses less digits than its factorization.

3581407645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702575.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 3581407645 is about 59844.8631463052. The cubic root of 3581407645 is about 1529.9758842512.

The spelling of 3581407645 in words is "three billion, five hundred eighty-one million, four hundred seven thousand, six hundred forty-five".