646260524421 has 16 divisors (see below), whose sum is σ = 889502458368. Its totient is φ = 416930270400.

The previous prime is 646260524419. The next prime is 646260524443. The reversal of 646260524421 is 124425062646.

It is not a de Polignac number, because 646260524421 - 2¹ = 646260524419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646260524821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4083255 + ... + 4238571.

It is an arithmetic number, because the mean of its divisors is an integer number (55593903648).

Almost surely, 2^646260524421 is an apocalyptic number.

It is an amenable number.

646260524421 is a deficient number, since it is larger than the sum of its proper divisors (243241933947).

646260524421 is a wasteful number, since it uses less digits than its factorization.

646260524421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200092.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 646260524421 in words is "six hundred forty-six billion, two hundred sixty million, five hundred twenty-four thousand, four hundred twenty-one".