646154413 has 4 divisors (see below), whose sum is σ = 680162560. Its totient is φ = 612146268.

The previous prime is 646154401. The next prime is 646154441. The reversal of 646154413 is 314451646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646154413 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 (646154813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17004045 + ... + 17004082.

It is an arithmetic number, because the mean of its divisors is an integer number (170040640).

Almost surely, 2^646154413 is an apocalyptic number.

It is an amenable number.

646154413 is a deficient number, since it is larger than the sum of its proper divisors (34008147).

646154413 is a wasteful number, since it uses less digits than its factorization.

646154413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34008146.

The product of its digits is 34560, while the sum is 34.

The square root of 646154413 is about 25419.5675218915. The cubic root of 646154413 is about 864.5274186937.

The spelling of 646154413 in words is "six hundred forty-six million, one hundred fifty-four thousand, four hundred thirteen".