71553017065 has 8 divisors (see below), whose sum is σ = 85873602240. Its totient is φ = 57235759152.

The previous prime is 71553017033. The next prime is 71553017077. The reversal of 71553017065 is 56071035517.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71553017065 - 2⁵ = 71553017033 is a prime.

It is a super-2 number, since 2×71553017065² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 784255 + ... + 870724.

It is an arithmetic number, because the mean of its divisors is an integer number (10734200280).

Almost surely, 2^71553017065 is an apocalyptic number.

It is an amenable number.

71553017065 is a deficient number, since it is larger than the sum of its proper divisors (14320585175).

71553017065 is a wasteful number, since it uses less digits than its factorization.

71553017065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663631.

The product of its (nonzero) digits is 110250, while the sum is 40.

The spelling of 71553017065 in words is "seventy-one billion, five hundred fifty-three million, seventeen thousand, sixty-five".