71942546281 has 4 divisors (see below), whose sum is σ = 71943974992. Its totient is φ = 71941117572.

The previous prime is 71942546243. The next prime is 71942546287. The reversal of 71942546281 is 18264524917.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18264524917 = 23 ⋅794109779.

It is a cyclic number.

It is not a de Polignac number, because 71942546281 - 2²¹ = 71940449129 is a prime.

It is a super-2 number, since 2×71942546281² (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 (71942546287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635955 + ... + 740488.

It is an arithmetic number, because the mean of its divisors is an integer number (17985993748).

Almost surely, 2^71942546281 is an apocalyptic number.

It is an amenable number.

71942546281 is a deficient number, since it is larger than the sum of its proper divisors (1428711).

71942546281 is a wasteful number, since it uses less digits than its factorization.

71942546281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428710.

The product of its digits is 967680, while the sum is 49.

The spelling of 71942546281 in words is "seventy-one billion, nine hundred forty-two million, five hundred forty-six thousand, two hundred eighty-one".