643402114452 has 36 divisors (see below), whose sum is σ = 1649284299936. Its totient is φ = 211446703440.

The previous prime is 643402114441. The next prime is 643402114483. The reversal of 643402114452 is 254411204346.

643402114452 is a `hidden beast` number, since 6 + 434 + 0 + 211 + 4 + 4 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125858578 + ... + 125863689.

It is an arithmetic number, because the mean of its divisors is an integer number (45813452776).

Almost surely, 2^643402114452 is an apocalyptic number.

It is an amenable number.

643402114452 is an abundant number, since it is smaller than the sum of its proper divisors (1005882185484).

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

643402114452 is a wasteful number, since it uses less digits than its factorization.

643402114452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251722348 (or 251722343 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 643402114452 its reverse (254411204346), we get a palindrome (897813318798).

The spelling of 643402114452 in words is "six hundred forty-three billion, four hundred two million, one hundred fourteen thousand, four hundred fifty-two".