71265205512 has 60 divisors (see below), whose sum is σ = 199627597455. Its totient is φ = 23752803312.

The previous prime is 71265205493. The next prime is 71265205541. The reversal of 71265205512 is 21550256217.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

71265205512 is a `hidden beast` number, since 7 + 126 + 520 + 5 + 5 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 35632602756 + 35632602756 = 188766^2 + 188766^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=188766.

It is a super-3 number, since 3×71265205512³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 6790333 + ... + 6800819.

Almost surely, 2^71265205512 is an apocalyptic number.

71265205512 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

71265205512 is an abundant number, since it is smaller than the sum of its proper divisors (128362391943).

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

71265205512 is an frugal number, since it uses more digits than its factorization.

71265205512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20992 (or 10492 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 71265205512 in words is "seventy-one billion, two hundred sixty-five million, two hundred five thousand, five hundred twelve".