75321502743645 has 24 divisors (see below), whose sum is σ = 130566194676216. Its totient is φ = 40168722513408.

The previous prime is 75321502743593. The next prime is 75321502743661. The reversal of 75321502743645 is 54634720512357.

75321502743645 is a `hidden beast` number, since 7 + 5 + 3 + 2 + 1 + 5 + 0 + 274 + 364 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 61384026564 + 75260118717081 = 247758^2 + 8675259^2 .

It is not a de Polignac number, because 75321502743645 - 2⁶ = 75321502743581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75321502743591 and 75321502743600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56534544 + ... + 57851513.

It is an arithmetic number, because the mean of its divisors is an integer number (5440258111509).

Almost surely, 2^{75321502743645} is an apocalyptic number.

It is an amenable number.

75321502743645 is a deficient number, since it is larger than the sum of its proper divisors (55244691932571).

75321502743645 is a wasteful number, since it uses less digits than its factorization.

75321502743645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114400701 (or 114400698 counting only the distinct ones).

The product of its (nonzero) digits is 21168000, while the sum is 54.

The spelling of 75321502743645 in words is "seventy-five trillion, three hundred twenty-one billion, five hundred two million, seven hundred forty-three thousand, six hundred forty-five".