71255570651 has 4 divisors (see below), whose sum is σ = 71266020912. Its totient is φ = 71245120392.

The previous prime is 71255570641. The next prime is 71255570689. The reversal of 71255570651 is 15607555217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15607555217 = 1607 ⋅9712231.

It is a cyclic number.

It is not a de Polignac number, because 71255570651 - 2²² = 71251376347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71255570641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5214896 + ... + 5228541.

It is an arithmetic number, because the mean of its divisors is an integer number (17816505228).

Almost surely, 2^71255570651 is an apocalyptic number.

71255570651 is a deficient number, since it is larger than the sum of its proper divisors (10450261).

71255570651 is a wasteful number, since it uses less digits than its factorization.

71255570651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10450260.

The product of its (nonzero) digits is 367500, while the sum is 44.

The spelling of 71255570651 in words is "seventy-one billion, two hundred fifty-five million, five hundred seventy thousand, six hundred fifty-one".