1247855489413 has 16 divisors (see below), whose sum is σ = 1355279276736. Its totient is φ = 1142080542720.

The previous prime is 1247855489393. The next prime is 1247855489423. The reversal of 1247855489413 is 3149845587421.

It is not a de Polignac number, because 1247855489413 - 2²⁹ = 1247318618501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247855489423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1645806 + ... + 2281312.

It is an arithmetic number, because the mean of its divisors is an integer number (84704954796).

Almost surely, 2^{1247855489413} is an apocalyptic number.

1247855489413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1247855489413 is a deficient number, since it is larger than the sum of its proper divisors (107423787323).

1247855489413 is a wasteful number, since it uses less digits than its factorization.

1247855489413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636804.

The product of its digits is 38707200, while the sum is 61.

The spelling of 1247855489413 in words is "one trillion, two hundred forty-seven billion, eight hundred fifty-five million, four hundred eighty-nine thousand, four hundred thirteen".