71012671581 has 8 divisors (see below), whose sum is σ = 94685589184. Its totient is φ = 47340767520.

The previous prime is 71012671573. The next prime is 71012671601. The reversal of 71012671581 is 18517621017.

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

It is not a de Polignac number, because 71012671581 - 2³ = 71012671573 is a prime.

It is a super-2 number, since 2×71012671581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71012671181) 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, 71185 + ... + 383526.

It is an arithmetic number, because the mean of its divisors is an integer number (11835698648).

Almost surely, 2^71012671581 is an apocalyptic number.

It is an amenable number.

71012671581 is a deficient number, since it is larger than the sum of its proper divisors (23672917603).

71012671581 is a wasteful number, since it uses less digits than its factorization.

71012671581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506771.

The product of its (nonzero) digits is 23520, while the sum is 39.

The spelling of 71012671581 in words is "seventy-one billion, twelve million, six hundred seventy-one thousand, five hundred eighty-one".