71217797552 has 20 divisors (see below), whose sum is σ = 150528527016. Its totient is φ = 32371726080.

The previous prime is 71217797461. The next prime is 71217797561. The reversal of 71217797552 is 25579771217.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 71217797494 and 71217797503.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202323113 + ... + 202323464.

Almost surely, 2^71217797552 is an apocalyptic number.

It is an amenable number.

71217797552 is an abundant number, since it is smaller than the sum of its proper divisors (79310729464).

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

71217797552 is a wasteful number, since it uses less digits than its factorization.

71217797552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404646596 (or 404646590 counting only the distinct ones).

The product of its digits is 2160900, while the sum is 53.

The spelling of 71217797552 in words is "seventy-one billion, two hundred seventeen million, seven hundred ninety-seven thousand, five hundred fifty-two".