71854812620 has 96 divisors (see below), whose sum is σ = 156159843840. Its totient is φ = 27760711680.

The previous prime is 71854812607. The next prime is 71854812629. The reversal of 71854812620 is 2621845817.

It is a super-2 number, since 2×71854812620² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71854812629) 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 31 ways as a sum of consecutive naturals, for example, 15919484 + ... + 15923996.

It is an arithmetic number, because the mean of its divisors is an integer number (1626665040).

Almost surely, 2^71854812620 is an apocalyptic number.

It is an amenable number.

71854812620 is an abundant number, since it is smaller than the sum of its proper divisors (84305031220).

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

71854812620 is a wasteful number, since it uses less digits than its factorization.

71854812620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4815 (or 4813 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 71854812620 in words is "seventy-one billion, eight hundred fifty-four million, eight hundred twelve thousand, six hundred twenty".