1495721662009 has 9 divisors (see below), whose sum is σ = 1588902882861. Its totient is φ = 1407718466880.

The previous prime is 1495721661997. The next prime is 1495721662031. The reversal of 1495721662009 is 9002661275941.

The square root of 1495721662009 is 1222997.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7389981225 + 1488331680784 = 85965^2 + 1219972^2 .

It is not a de Polignac number, because 1495721662009 - 2⁵ = 1495721661977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1495721660009) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20754979 + ... + 20826919.

Almost surely, 2^{1495721662009} is an apocalyptic number.

1495721662009 is the 1222997-th square number.

1495721662009 is the 611499-th centered octagonal number.

It is an amenable number.

1495721662009 is a deficient number, since it is larger than the sum of its proper divisors (93181220852).

1495721662009 is an frugal number, since it uses more digits than its factorization.

1495721662009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143916 (or 71958 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 1495721662009 in words is "one trillion, four hundred ninety-five billion, seven hundred twenty-one million, six hundred sixty-two thousand, nine".