1351380778138 has 16 divisors (see below), whose sum is σ = 2120376375360. Its totient is φ = 644732310816.

The previous prime is 1351380778129. The next prime is 1351380778169. The reversal of 1351380778138 is 8318770831531.

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 7 ways as a sum of consecutive naturals, for example, 35895420 + ... + 35933047.

It is an arithmetic number, because the mean of its divisors is an integer number (132523523460).

Almost surely, 2^{1351380778138} is an apocalyptic number.

1351380778138 is a deficient number, since it is larger than the sum of its proper divisors (768995597222).

1351380778138 is a wasteful number, since it uses less digits than its factorization.

1351380778138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71828901.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 1351380778138 in words is "one trillion, three hundred fifty-one billion, three hundred eighty million, seven hundred seventy-eight thousand, one hundred thirty-eight".