646241455133 has 4 divisors (see below), whose sum is σ = 674338909728. Its totient is φ = 618144000540.

The previous prime is 646241455127. The next prime is 646241455147. The reversal of 646241455133 is 331554142646.

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 not a de Polignac number, because 646241455133 - 2³⁴ = 629061585949 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 (646241455163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14048727263 + ... + 14048727308.

It is an arithmetic number, because the mean of its divisors is an integer number (168584727432).

Almost surely, 2^646241455133 is an apocalyptic number.

It is an amenable number.

646241455133 is a deficient number, since it is larger than the sum of its proper divisors (28097454595).

646241455133 is a wasteful number, since it uses less digits than its factorization.

646241455133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28097454594.

The product of its digits is 1036800, while the sum is 44.

Adding to 646241455133 its reverse (331554142646), we get a palindrome (977795597779).

The spelling of 646241455133 in words is "six hundred forty-six billion, two hundred forty-one million, four hundred fifty-five thousand, one hundred thirty-three".