71894605901 has 4 divisors (see below), whose sum is σ = 71928250812. Its totient is φ = 71860960992.

The previous prime is 71894605877. The next prime is 71894605907. The reversal of 71894605901 is 10950649817.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30431058025 + 41463547876 = 174445^2 + 203626^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71894605901 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 71894605901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71894605907) 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, 16819250 + ... + 16823523.

It is an arithmetic number, because the mean of its divisors is an integer number (17982062703).

Almost surely, 2^71894605901 is an apocalyptic number.

It is an amenable number.

71894605901 is a deficient number, since it is larger than the sum of its proper divisors (33644911).

71894605901 is a wasteful number, since it uses less digits than its factorization.

71894605901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33644910.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 71894605901 in words is "seventy-one billion, eight hundred ninety-four million, six hundred five thousand, nine hundred one".