75561496973 has 2 divisors, whose sum is σ = 75561496974. Its totient is φ = 75561496972.

The previous prime is 75561496957. The next prime is 75561496991. The reversal of 75561496973 is 37969416557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69486541609 + 6074955364 = 263603^2 + 77942^2 .

It is an emirp because it is prime and its reverse (37969416557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75561496973 - 2⁴ = 75561496957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75561496993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37780748486 + 37780748487.

It is an arithmetic number, because the mean of its divisors is an integer number (37780748487).

Almost surely, 2^75561496973 is an apocalyptic number.

It is an amenable number.

75561496973 is a deficient number, since it is larger than the sum of its proper divisors (1).

75561496973 is an equidigital number, since it uses as much as digits as its factorization.

75561496973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42865200, while the sum is 62.

The spelling of 75561496973 in words is "seventy-five billion, five hundred sixty-one million, four hundred ninety-six thousand, nine hundred seventy-three".