73644768532 has 6 divisors (see below), whose sum is σ = 128878344938. Its totient is φ = 36822384264.

The previous prime is 73644768517. The next prime is 73644768541. The reversal of 73644768532 is 23586744637.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 68516203536 + 5128564996 = 261756^2 + 71614^2 .

It is a congruent number.

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, 9205596063 + ... + 9205596070.

Almost surely, 2^73644768532 is an apocalyptic number.

It is an amenable number.

73644768532 is a deficient number, since it is larger than the sum of its proper divisors (55233576406).

73644768532 is a wasteful number, since it uses less digits than its factorization.

73644768532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18411192137 (or 18411192135 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 55.

The spelling of 73644768532 in words is "seventy-three billion, six hundred forty-four million, seven hundred sixty-eight thousand, five hundred thirty-two".