1381957409019 has 64 divisors (see below), whose sum is σ = 2042159592960. Its totient is φ = 824340602880.

The previous prime is 1381957409017. The next prime is 1381957409023. The reversal of 1381957409019 is 9109047591831.

It is a happy number.

It is not a de Polignac number, because 1381957409019 - 2¹ = 1381957409017 is a prime.

It is a super-2 number, since 2×1381957409019² (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 1381957409019.

It is not an unprimeable number, because it can be changed into a prime (1381957409017) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 237732757 + ... + 237738569.

It is an arithmetic number, because the mean of its divisors is an integer number (31908743640).

Almost surely, 2^{1381957409019} is an apocalyptic number.

1381957409019 is a deficient number, since it is larger than the sum of its proper divisors (660202183941).

1381957409019 is a wasteful number, since it uses less digits than its factorization.

1381957409019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6412.

The product of its (nonzero) digits is 2449440, while the sum is 57.

The spelling of 1381957409019 in words is "one trillion, three hundred eighty-one billion, nine hundred fifty-seven million, four hundred nine thousand, nineteen".