71657676821492 has 6 divisors (see below), whose sum is σ = 125400934437618. Its totient is φ = 35828838410744.

The previous prime is 71657676821483. The next prime is 71657676821557. The reversal of 71657676821492 is 29412867675617.

It can be written as a sum of positive squares in only one way, i.e., 40832151120016 + 30825525701476 = 6390004^2 + 5552074^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8957209602683 + ... + 8957209602690.

It is an arithmetic number, because the mean of its divisors is an integer number (20900155739603).

Almost surely, 2^{71657676821492} is an apocalyptic number.

It is an amenable number.

71657676821492 is a deficient number, since it is larger than the sum of its proper divisors (53743257616126).

71657676821492 is a wasteful number, since it uses less digits than its factorization.

71657676821492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17914419205377 (or 17914419205375 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 71.

The spelling of 71657676821492 in words is "seventy-one trillion, six hundred fifty-seven billion, six hundred seventy-six million, eight hundred twenty-one thousand, four hundred ninety-two".