101643554644 has 6 divisors (see below), whose sum is σ = 177876220634. Its totient is φ = 50821777320.

The previous prime is 101643554603. The next prime is 101643554689. The reversal of 101643554644 is 446455346101.

It can be written as a sum of positive squares in only one way, i.e., 72569894544 + 29073660100 = 269388^2 + 170510^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 101643554644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12705444327 + ... + 12705444334.

Almost surely, 2^101643554644 is an apocalyptic number.

It is an amenable number.

101643554644 is a deficient number, since it is larger than the sum of its proper divisors (76232665990).

101643554644 is a wasteful number, since it uses less digits than its factorization.

101643554644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25410888665 (or 25410888663 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 101643554644 in words is "one hundred one billion, six hundred forty-three million, five hundred fifty-four thousand, six hundred forty-four".