71520274650 has 144 divisors (see below), whose sum is σ = 196370244000. Its totient is φ = 17212905600.

The previous prime is 71520274619. The next prime is 71520274669. The reversal of 71520274650 is 5647202517.

It is a super-2 number, since 2×71520274650² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71520274599 and 71520274608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2508676 + ... + 2537024.

It is an arithmetic number, because the mean of its divisors is an integer number (1363682250).

Almost surely, 2^71520274650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71520274650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98185122000).

71520274650 is an abundant number, since it is smaller than the sum of its proper divisors (124849969350).

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

71520274650 is a wasteful number, since it uses less digits than its factorization.

71520274650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28525 (or 28509 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 39.

The spelling of 71520274650 in words is "seventy-one billion, five hundred twenty million, two hundred seventy-four thousand, six hundred fifty".