71642453806 has 48 divisors (see below), whose sum is σ = 137779315632. Its totient is φ = 27624844800.

The previous prime is 71642453777. The next prime is 71642453809. The reversal of 71642453806 is 60835424617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71642453809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238005 + ... + 447136.

It is an arithmetic number, because the mean of its divisors is an integer number (2870402409).

Almost surely, 2^71642453806 is an apocalyptic number.

71642453806 is a deficient number, since it is larger than the sum of its proper divisors (66136861826).

71642453806 is a wasteful number, since it uses less digits than its factorization.

71642453806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685265 (or 685258 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 71642453806 in words is "seventy-one billion, six hundred forty-two million, four hundred fifty-three thousand, eight hundred six".