72141635305 has 4 divisors (see below), whose sum is σ = 86569962372. Its totient is φ = 57713308240.

The previous prime is 72141635273. The next prime is 72141635329. The reversal of 72141635305 is 50353614127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50353614127 = 12323 ⋅4086149.

It can be written as a sum of positive squares in 2 ways, for example, as 21770117209 + 50371518096 = 147547^2 + 224436^2 .

It is not a de Polignac number, because 72141635305 - 2⁵ = 72141635273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7214163526 + ... + 7214163535.

It is an arithmetic number, because the mean of its divisors is an integer number (21642490593).

Almost surely, 2^72141635305 is an apocalyptic number.

It is an amenable number.

72141635305 is a deficient number, since it is larger than the sum of its proper divisors (14428327067).

72141635305 is a wasteful number, since it uses less digits than its factorization.

72141635305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14428327066.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 72141635305 in words is "seventy-two billion, one hundred forty-one million, six hundred thirty-five thousand, three hundred five".