4521532421646 has 12 divisors (see below), whose sum is σ = 9796653580272. Its totient is φ = 1507177473876.

The previous prime is 4521532421633. The next prime is 4521532421683. The reversal of 4521532421646 is 6461242351254.

It is a happy number.

4521532421646 is a `hidden beast` number, since 4 + 5 + 21 + 532 + 42 + 16 + 46 = 666.

It is a super-2 number, since 2×4521532421646² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125598122806 + ... + 125598122841.

It is an arithmetic number, because the mean of its divisors is an integer number (816387798356).

Almost surely, 2^{4521532421646} is an apocalyptic number.

4521532421646 is an abundant number, since it is smaller than the sum of its proper divisors (5275121158626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4521532421646 is a wasteful number, since it uses less digits than its factorization.

4521532421646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251196245655 (or 251196245652 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The spelling of 4521532421646 in words is "four trillion, five hundred twenty-one billion, five hundred thirty-two million, four hundred twenty-one thousand, six hundred forty-six".