71640251701 has 8 divisors (see below), whose sum is σ = 75917565144. Its totient is φ = 67369958400.

The previous prime is 71640251689. The next prime is 71640251743. The reversal of 71640251701 is 10715204617.

It can be written as a sum of positive squares in 4 ways, for example, as 97911025 + 71542340676 = 9895^2 + 267474^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71640251701 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 (71640201701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1734010 + ... + 1774843.

It is an arithmetic number, because the mean of its divisors is an integer number (9489695643).

Almost surely, 2^71640251701 is an apocalyptic number.

It is an amenable number.

71640251701 is a deficient number, since it is larger than the sum of its proper divisors (4277313443).

71640251701 is a wasteful number, since it uses less digits than its factorization.

71640251701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510071.

The product of its (nonzero) digits is 11760, while the sum is 34.

The spelling of 71640251701 in words is "seventy-one billion, six hundred forty million, two hundred fifty-one thousand, seven hundred one".