75477804109 has 2 divisors, whose sum is σ = 75477804110. Its totient is φ = 75477804108.

The previous prime is 75477804089. The next prime is 75477804163. The reversal of 75477804109 is 90140877457.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47525308009 + 27952496100 = 218003^2 + 167190^2 .

It is a cyclic number.

It is not a de Polignac number, because 75477804109 - 2¹¹ = 75477802061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75477802109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37738902054 + 37738902055.

It is an arithmetic number, because the mean of its divisors is an integer number (37738902055).

Almost surely, 2^75477804109 is an apocalyptic number.

It is an amenable number.

75477804109 is a deficient number, since it is larger than the sum of its proper divisors (1).

75477804109 is an equidigital number, since it uses as much as digits as its factorization.

75477804109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 75477804109 in words is "seventy-five billion, four hundred seventy-seven million, eight hundred four thousand, one hundred nine".