1381678905600 has 1728 divisors, whose sum is σ = 6180271104000. Its totient is φ = 295015219200.

The previous prime is 1381678905571. The next prime is 1381678905647. The reversal of 1381678905600 is 65098761831.

1381678905600 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 6 + 78 + 9 + 0 + 560 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1728).

It is a super-2 number, since 2×1381678905600² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1815609220 + ... + 1815609980.

Almost surely, 2^{1381678905600} is an apocalyptic number.

1381678905600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381678905600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3090135552000).

1381678905600 is an abundant number, since it is smaller than the sum of its proper divisors (4798592198400).

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

1381678905600 is a wasteful number, since it uses less digits than its factorization.

1381678905600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 1381678905600 in words is "one trillion, three hundred eighty-one billion, six hundred seventy-eight million, nine hundred five thousand, six hundred".