71798256618 has 32 divisors (see below), whose sum is σ = 158087920320. Its totient is φ = 21557439360.

The previous prime is 71798256587. The next prime is 71798256619. The reversal of 71798256618 is 81665289717.

It is not an unprimeable number, because it can be changed into a prime (71798256619) by changing a digit.

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, 4982955 + ... + 4997342.

It is an arithmetic number, because the mean of its divisors is an integer number (4940247510).

Almost surely, 2^71798256618 is an apocalyptic number.

71798256618 is an abundant number, since it is smaller than the sum of its proper divisors (86289663702).

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

71798256618 is a wasteful number, since it uses less digits than its factorization.

71798256618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9980422.

The product of its digits is 10160640, while the sum is 60.

The spelling of 71798256618 in words is "seventy-one billion, seven hundred ninety-eight million, two hundred fifty-six thousand, six hundred eighteen".