71386827420437 has 4 divisors (see below), whose sum is σ = 71389330756716. Its totient is φ = 71384324084160.

The previous prime is 71386827420421. The next prime is 71386827420457. The reversal of 71386827420437 is 73402472868317.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31719491584036 + 39667335836401 = 5632006^2 + 6298201^2 .

It is a cyclic number.

It is not a de Polignac number, because 71386827420437 - 2⁴ = 71386827420421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71386827420437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71386827420407) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1251625364 + ... + 1251682397.

It is an arithmetic number, because the mean of its divisors is an integer number (17847332689179).

Almost surely, 2^{71386827420437} is an apocalyptic number.

It is an amenable number.

71386827420437 is a deficient number, since it is larger than the sum of its proper divisors (2503336279).

71386827420437 is a wasteful number, since it uses less digits than its factorization.

71386827420437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503336278.

The product of its (nonzero) digits is 75866112, while the sum is 62.

The spelling of 71386827420437 in words is "seventy-one trillion, three hundred eighty-six billion, eight hundred twenty-seven million, four hundred twenty thousand, four hundred thirty-seven".