71945950109501 has 16 divisors (see below), whose sum is σ = 77737192788528. Its totient is φ = 66191480486400.

The previous prime is 71945950109497. The next prime is 71945950109503. The reversal of 71945950109501 is 10590105954917.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 36144264240100 + 35801685869401 = 6012010^2 + 5983451^2 .

It is a cyclic number.

It is not a de Polignac number, because 71945950109501 - 2² = 71945950109497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71945950109503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24233561 + ... + 27039921.

It is an arithmetic number, because the mean of its divisors is an integer number (4858574549283).

Almost surely, 2^{71945950109501} is an apocalyptic number.

It is an amenable number.

71945950109501 is a deficient number, since it is larger than the sum of its proper divisors (5791242679027).

71945950109501 is a wasteful number, since it uses less digits than its factorization.

71945950109501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812912.

The product of its (nonzero) digits is 2551500, while the sum is 56.

The spelling of 71945950109501 in words is "seventy-one trillion, nine hundred forty-five billion, nine hundred fifty million, one hundred nine thousand, five hundred one".