1491909552636 has 12 divisors (see below), whose sum is σ = 3481122289512. Its totient is φ = 497303184208.

The previous prime is 1491909552593. The next prime is 1491909552649. The reversal of 1491909552636 is 6362559091941.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1491909552636² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1491909552636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62162898015 + ... + 62162898038.

It is an arithmetic number, because the mean of its divisors is an integer number (290093524126).

Almost surely, 2^{1491909552636} is an apocalyptic number.

It is an amenable number.

1491909552636 is an abundant number, since it is smaller than the sum of its proper divisors (1989212736876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1491909552636 is a wasteful number, since it uses less digits than its factorization.

1491909552636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124325796060 (or 124325796058 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 60.

The spelling of 1491909552636 in words is "one trillion, four hundred ninety-one billion, nine hundred nine million, five hundred fifty-two thousand, six hundred thirty-six".