643443600760151 has 4 divisors (see below), whose sum is σ = 643466491805400. Its totient is φ = 643420709714904.

The previous prime is 643443600760117. The next prime is 643443600760201. The reversal of 643443600760151 is 151067006344346.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 643443600760151 - 2²⁶ = 643443533651287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 643443600760151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643443600760651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11445480461 + ... + 11445536678.

It is an arithmetic number, because the mean of its divisors is an integer number (160866622951350).

Almost surely, 2^{643443600760151} is an apocalyptic number.

643443600760151 is a deficient number, since it is larger than the sum of its proper divisors (22891045249).

643443600760151 is a wasteful number, since it uses less digits than its factorization.

643443600760151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22891045248.

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 643443600760151 in words is "six hundred forty-three trillion, four hundred forty-three billion, six hundred million, seven hundred sixty thousand, one hundred fifty-one".