73843778432 has 32 divisors (see below), whose sum is σ = 147450510480. Its totient is φ = 36836591616.

The previous prime is 73843778429. The next prime is 73843778461. The reversal of 73843778432 is 23487734837.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×73843778432² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610748 + ... + 721595.

Almost surely, 2^73843778432 is an apocalyptic number.

It is an amenable number.

73843778432 is a deficient number, since it is larger than the sum of its proper divisors (73606732048).

73843778432 is a wasteful number, since it uses less digits than its factorization.

73843778432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332790 (or 1332778 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 56.

The spelling of 73843778432 in words is "seventy-three billion, eight hundred forty-three million, seven hundred seventy-eight thousand, four hundred thirty-two".