1381453952526 has 12 divisors (see below), whose sum is σ = 2993150230512. Its totient is φ = 460484650836.

The previous prime is 1381453952509. The next prime is 1381453952603. The reversal of 1381453952526 is 6252593541831.

1381453952526 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 4 + 539 + 52 + 52 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38373720886 + ... + 38373720921.

It is an arithmetic number, because the mean of its divisors is an integer number (249429185876).

Almost surely, 2^{1381453952526} is an apocalyptic number.

1381453952526 is an abundant number, since it is smaller than the sum of its proper divisors (1611696277986).

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

1381453952526 is a wasteful number, since it uses less digits than its factorization.

1381453952526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76747441815 (or 76747441812 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 54.

The spelling of 1381453952526 in words is "one trillion, three hundred eighty-one billion, four hundred fifty-three million, nine hundred fifty-two thousand, five hundred twenty-six".