71211907445 has 16 divisors (see below), whose sum is σ = 97776577920. Its totient is φ = 48773755584.

The previous prime is 71211907391. The next prime is 71211907469. The reversal of 71211907445 is 54470911217.

It is a cyclic number.

It is not a de Polignac number, because 71211907445 - 2²⁶ = 71144798581 is a prime.

It is a super-2 number, since 2×71211907445² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162775 + ... + 1222484.

It is an arithmetic number, because the mean of its divisors is an integer number (6111036120).

Almost surely, 2^71211907445 is an apocalyptic number.

It is an amenable number.

71211907445 is a deficient number, since it is larger than the sum of its proper divisors (26564670475).

71211907445 is a wasteful number, since it uses less digits than its factorization.

71211907445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386124.

The product of its (nonzero) digits is 70560, while the sum is 41.

The spelling of 71211907445 in words is "seventy-one billion, two hundred eleven million, nine hundred seven thousand, four hundred forty-five".