71945909398894 has 32 divisors (see below), whose sum is σ = 114668808027840. Its totient is φ = 33737991393792.

The previous prime is 71945909398849. The next prime is 71945909398919. The reversal of 71945909398894 is 49889390954917.

It is a happy number.

It is a super-3 number, since 3×71945909398894³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14612332 + ... + 18905344.

It is an arithmetic number, because the mean of its divisors is an integer number (3583400250870).

Almost surely, 2^{71945909398894} is an apocalyptic number.

71945909398894 is a deficient number, since it is larger than the sum of its proper divisors (42722898628946).

71945909398894 is a wasteful number, since it uses less digits than its factorization.

71945909398894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294764.

The product of its (nonzero) digits is 6348948480, while the sum is 85.

The spelling of 71945909398894 in words is "seventy-one trillion, nine hundred forty-five billion, nine hundred nine million, three hundred ninety-eight thousand, eight hundred ninety-four".