1381561195734 has 12 divisors (see below), whose sum is σ = 2993382590796. Its totient is φ = 460520398572.

The previous prime is 1381561195733. The next prime is 1381561195753. The reversal of 1381561195734 is 4375911651831.

1381561195734 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 5 + 61 + 1 + 9 + 573 + 4 = 666.

It is a super-2 number, since 2×1381561195734² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381561195733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38376699864 + ... + 38376699899.

It is an arithmetic number, because the mean of its divisors is an integer number (249448549233).

Almost surely, 2^{1381561195734} is an apocalyptic number.

1381561195734 is an abundant number, since it is smaller than the sum of its proper divisors (1611821395062).

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

1381561195734 is a wasteful number, since it uses less digits than its factorization.

1381561195734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76753399771 (or 76753399768 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The spelling of 1381561195734 in words is "one trillion, three hundred eighty-one billion, five hundred sixty-one million, one hundred ninety-five thousand, seven hundred thirty-four".