72643803101 has 4 divisors (see below), whose sum is σ = 72645026304. Its totient is φ = 72642579900.

The previous prime is 72643803061. The next prime is 72643803103. The reversal of 72643803101 is 10130834627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72643803101 - 2²⁶ = 72576694237 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 (72643803103) 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, 517715 + ... + 642896.

It is an arithmetic number, because the mean of its divisors is an integer number (18161256576).

Almost surely, 2^72643803101 is an apocalyptic number.

It is an amenable number.

72643803101 is a deficient number, since it is larger than the sum of its proper divisors (1223203).

72643803101 is a wasteful number, since it uses less digits than its factorization.

72643803101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223202.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 72643803101 in words is "seventy-two billion, six hundred forty-three million, eight hundred three thousand, one hundred one".