464188644509 has 2 divisors, whose sum is σ = 464188644510. Its totient is φ = 464188644508.

The previous prime is 464188644457. The next prime is 464188644553. The reversal of 464188644509 is 905446881464.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 451469767225 + 12718877284 = 671915^2 + 112778^2 .

It is a cyclic number.

It is not a de Polignac number, because 464188644509 - 2³² = 459893677213 is a prime.

It is a super-2 number, since 2×464188644509² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (464188644559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232094322254 + 232094322255.

It is an arithmetic number, because the mean of its divisors is an integer number (232094322255).

Almost surely, 2^464188644509 is an apocalyptic number.

It is an amenable number.

464188644509 is a deficient number, since it is larger than the sum of its proper divisors (1).

464188644509 is an equidigital number, since it uses as much as digits as its factorization.

464188644509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26542080, while the sum is 59.

The spelling of 464188644509 in words is "four hundred sixty-four billion, one hundred eighty-eight million, six hundred forty-four thousand, five hundred nine".