1491087652201 has 9 divisors (see below), whose sum is σ = 1734540477501. Its totient is φ = 1278067803852.

The previous prime is 1491087652163. The next prime is 1491087652213. The reversal of 1491087652201 is 1022567801941.

The square root of 1491087652201 is 1221101.

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

It is not a de Polignac number, because 1491087652201 - 2²³ = 1491079263593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491087652261) 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, 8460486 + ... + 8634928.

Almost surely, 2^{1491087652201} is an apocalyptic number.

1491087652201 is the 1221101-st square number.

1491087652201 is the 610551-st centered octagonal number.

It is an amenable number.

1491087652201 is a deficient number, since it is larger than the sum of its proper divisors (243452825300).

1491087652201 is an frugal number, since it uses more digits than its factorization.

1491087652201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348900 (or 174450 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 1491087652201 in words is "one trillion, four hundred ninety-one billion, eighty-seven million, six hundred fifty-two thousand, two hundred one".