643141642525 has 48 divisors (see below), whose sum is σ = 865470106368. Its totient is φ = 472181504000.

The previous prime is 643141642523. The next prime is 643141642529. The reversal of 643141642525 is 525246141346.

It is not a de Polignac number, because 643141642525 - 2¹ = 643141642523 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 (643141642523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35938830 + ... + 35956720.

It is an arithmetic number, because the mean of its divisors is an integer number (18030627216).

Almost surely, 2^643141642525 is an apocalyptic number.

It is an amenable number.

643141642525 is a deficient number, since it is larger than the sum of its proper divisors (222328463843).

643141642525 is a wasteful number, since it uses less digits than its factorization.

643141642525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20022 (or 20017 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The spelling of 643141642525 in words is "six hundred forty-three billion, one hundred forty-one million, six hundred forty-two thousand, five hundred twenty-five".