71583935642 has 4 divisors (see below), whose sum is σ = 107375903466. Its totient is φ = 35791967820.

The previous prime is 71583935639. The next prime is 71583935651. The reversal of 71583935642 is 24653938517.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 40646995321 + 30936940321 = 201611^2 + 175889^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17895983909 + ... + 17895983912.

Almost surely, 2^71583935642 is an apocalyptic number.

71583935642 is a deficient number, since it is larger than the sum of its proper divisors (35791967824).

71583935642 is a wasteful number, since it uses less digits than its factorization.

71583935642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35791967823.

The product of its digits is 5443200, while the sum is 53.

The spelling of 71583935642 in words is "seventy-one billion, five hundred eighty-three million, nine hundred thirty-five thousand, six hundred forty-two".