71217538077 has 16 divisors (see below), whose sum is σ = 113240309760. Its totient is φ = 38926355952.

The previous prime is 71217538069. The next prime is 71217538087. The reversal of 71217538077 is 77083571217.

It is not a de Polignac number, because 71217538077 - 2³ = 71217538069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71217538057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73723677 + ... + 73724642.

It is an arithmetic number, because the mean of its divisors is an integer number (7077519360).

Almost surely, 2^71217538077 is an apocalyptic number.

It is an amenable number.

71217538077 is a deficient number, since it is larger than the sum of its proper divisors (42022771683).

71217538077 is a wasteful number, since it uses less digits than its factorization.

71217538077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147448352.

The product of its (nonzero) digits is 576240, while the sum is 48.

The spelling of 71217538077 in words is "seventy-one billion, two hundred seventeen million, five hundred thirty-eight thousand, seventy-seven".