71427161421 has 64 divisors (see below), whose sum is σ = 132162201600. Its totient is φ = 37039420800.

The previous prime is 71427161419. The next prime is 71427161447. The reversal of 71427161421 is 12416172417.

71427161421 is a `hidden beast` number, since 7 + 14 + 2 + 7 + 1 + 614 + 21 = 666.

It is not a de Polignac number, because 71427161421 - 2¹ = 71427161419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71427161521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1157025 + ... + 1217193.

It is an arithmetic number, because the mean of its divisors is an integer number (2065034400).

Almost surely, 2^71427161421 is an apocalyptic number.

It is an amenable number.

71427161421 is a deficient number, since it is larger than the sum of its proper divisors (60735040179).

71427161421 is a wasteful number, since it uses less digits than its factorization.

71427161421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60767 (or 60761 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

It can be divided in two parts, 714 and 27161421, that added together give a triangular number (27162135 = T₇₃₇₀).

The spelling of 71427161421 in words is "seventy-one billion, four hundred twenty-seven million, one hundred sixty-one thousand, four hundred twenty-one".