71640251700 has 72 divisors (see below), whose sum is σ = 208331478432. Its totient is φ = 19007076480.

The previous prime is 71640251689. The next prime is 71640251743. The reversal of 71640251700 is 715204617.

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 23 ways as a sum of consecutive naturals, for example, 546994 + ... + 665193.

It is an arithmetic number, because the mean of its divisors is an integer number (2893492756).

Almost surely, 2^71640251700 is an apocalyptic number.

It is an amenable number.

71640251700 is an abundant number, since it is smaller than the sum of its proper divisors (136691226732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71640251700 is a wasteful number, since it uses less digits than its factorization.

71640251700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212401 (or 1212394 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The spelling of 71640251700 in words is "seventy-one billion, six hundred forty million, two hundred fifty-one thousand, seven hundred".