71577901481 has 8 divisors (see below), whose sum is σ = 77030799624. Its totient is φ = 66263051520.

The previous prime is 71577901463. The next prime is 71577901531. The reversal of 71577901481 is 18410977517.

It can be written as a sum of positive squares in 4 ways, for example, as 1519752256 + 70058149225 = 38984^2 + 264685^2 .

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

It is not a de Polignac number, because 71577901481 - 2³⁰ = 70504159657 is a prime.

It is a super-2 number, since 2×71577901481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71577907481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34510970 + ... + 34513043.

It is an arithmetic number, because the mean of its divisors is an integer number (9628849953).

Almost surely, 2^71577901481 is an apocalyptic number.

It is an amenable number.

71577901481 is a deficient number, since it is larger than the sum of its proper divisors (5452898143).

71577901481 is a wasteful number, since it uses less digits than its factorization.

71577901481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69024091.

The product of its (nonzero) digits is 493920, while the sum is 50.

The spelling of 71577901481 in words is "seventy-one billion, five hundred seventy-seven million, nine hundred one thousand, four hundred eighty-one".