1247911368438 has 64 divisors (see below), whose sum is σ = 2894361039360. Its totient is φ = 351329190912.

The previous prime is 1247911368427. The next prime is 1247911368449. The reversal of 1247911368438 is 8348631197421.

It is an interprime number because it is at equal distance from previous prime (1247911368427) and next prime (1247911368449).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264145 + ... + 1601747.

It is an arithmetic number, because the mean of its divisors is an integer number (45224391240).

Almost surely, 2^{1247911368438} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247911368438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1447180519680).

1247911368438 is an abundant number, since it is smaller than the sum of its proper divisors (1646449670922).

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

1247911368438 is a wasteful number, since it uses less digits than its factorization.

1247911368438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337941.

The product of its digits is 6967296, while the sum is 57.

The spelling of 1247911368438 in words is "one trillion, two hundred forty-seven billion, nine hundred eleven million, three hundred sixty-eight thousand, four hundred thirty-eight".