71851040898 has 64 divisors (see below), whose sum is σ = 177780755712. Its totient is φ = 18851512320.

The previous prime is 71851040887. The next prime is 71851040909. The reversal of 71851040898 is 89804015817.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71851040887) and next prime (71851040909).

It is a self number, because there is not a number n which added to its sum of digits gives 71851040898.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235543 + ... + 446298.

It is an arithmetic number, because the mean of its divisors is an integer number (2777824308).

Almost surely, 2^71851040898 is an apocalyptic number.

71851040898 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

71851040898 is an abundant number, since it is smaller than the sum of its proper divisors (105929714814).

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

71851040898 is a wasteful number, since it uses less digits than its factorization.

71851040898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682059.

The product of its (nonzero) digits is 645120, while the sum is 51.

The spelling of 71851040898 in words is "seventy-one billion, eight hundred fifty-one million, forty thousand, eight hundred ninety-eight".