405061649 has 8 divisors (see below), whose sum is σ = 407090880. Its totient is φ = 403037776.

The previous prime is 405061619. The next prime is 405061687. The reversal of 405061649 is 946160504.

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-405061649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (405061619) 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, 265202 + ... + 266724.

It is an arithmetic number, because the mean of its divisors is an integer number (50886360).

Almost surely, 2^405061649 is an apocalyptic number.

It is an amenable number.

405061649 is a deficient number, since it is larger than the sum of its proper divisors (2029231).

405061649 is a wasteful number, since it uses less digits than its factorization.

405061649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 405061649 is about 20126.1434209339. The cubic root of 405061649 is about 739.9011610138.

The spelling of 405061649 in words is "four hundred five million, sixty-one thousand, six hundred forty-nine".