71957645390 has 16 divisors (see below), whose sum is σ = 137142806832. Its totient is φ = 27089937024.

The previous prime is 71957645363. The next prime is 71957645411. The reversal of 71957645390 is 9354675917.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211639964 + ... + 211640303.

It is an arithmetic number, because the mean of its divisors is an integer number (8571425427).

Almost surely, 2^71957645390 is an apocalyptic number.

71957645390 is a deficient number, since it is larger than the sum of its proper divisors (65185161442).

71957645390 is a wasteful number, since it uses less digits than its factorization.

71957645390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423280291.

The product of its (nonzero) digits is 7144200, while the sum is 56.

The spelling of 71957645390 in words is "seventy-one billion, nine hundred fifty-seven million, six hundred forty-five thousand, three hundred ninety".