71155562500 has 189 divisors, whose sum is σ = 172869213027. Its totient is φ = 25608000000.

The previous prime is 71155562473. The next prime is 71155562519. The reversal of 71155562500 is 526555117.

The square root of 71155562500 is 266750.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 10 ways, for example, as 56171844036 + 14983718464 = 237006^2 + 122408^2 .

It is a super-2 number, since 2×71155562500² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71155562500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 733562452 + ... + 733562548.

Almost surely, 2^71155562500 is an apocalyptic number.

71155562500 is the 266750-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71155562500

71155562500 is an abundant number, since it is smaller than the sum of its proper divisors (101713650527).

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

71155562500 is an frugal number, since it uses more digits than its factorization.

71155562500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 71155562500 in words is "seventy-one billion, one hundred fifty-five million, five hundred sixty-two thousand, five hundred".