643250151544 has 64 divisors (see below), whose sum is σ = 1619371031040. Its totient is φ = 231338712960.

The previous prime is 643250151469. The next prime is 643250151569. The reversal of 643250151544 is 445151052346.

It is a super-2 number, since 2×643250151544² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643250151497 and 643250151506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40154964 + ... + 40170979.

It is an arithmetic number, because the mean of its divisors is an integer number (25302672360).

Almost surely, 2^643250151544 is an apocalyptic number.

It is an amenable number.

643250151544 is an abundant number, since it is smaller than the sum of its proper divisors (976120879496).

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

643250151544 is a wasteful number, since it uses less digits than its factorization.

643250151544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80325980 (or 80325976 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 643250151544 in words is "six hundred forty-three billion, two hundred fifty million, one hundred fifty-one thousand, five hundred forty-four".