71638377461 has 8 divisors (see below), whose sum is σ = 86181506880. Its totient is φ = 58172516928.

The previous prime is 71638377439. The next prime is 71638377463. The reversal of 71638377461 is 16477383617.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71638377461 - 2²² = 71634183157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71638377463) 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 7 ways as a sum of consecutive naturals, for example, 269317076 + ... + 269317341.

It is an arithmetic number, because the mean of its divisors is an integer number (10772688360).

Almost surely, 2^71638377461 is an apocalyptic number.

It is an amenable number.

71638377461 is a deficient number, since it is larger than the sum of its proper divisors (14543129419).

71638377461 is a wasteful number, since it uses less digits than its factorization.

71638377461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538634443.

The product of its digits is 3556224, while the sum is 53.

The spelling of 71638377461 in words is "seventy-one billion, six hundred thirty-eight million, three hundred seventy-seven thousand, four hundred sixty-one".