1381091637240 has 1024 divisors, whose sum is σ = 5582255616000. Its totient is φ = 300799070208.

The previous prime is 1381091637239. The next prime is 1381091637301. The reversal of 1381091637240 is 427361901831.

1381091637240 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 0 + 9 + 1 + 637 + 2 + 4 + 0 = 666.

It is a super-2 number, since 2×1381091637240² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1473950052 + ... + 1473950988.

It is an arithmetic number, because the mean of its divisors is an integer number (5451421500).

Almost surely, 2^{1381091637240} is an apocalyptic number.

1381091637240 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 1381091637240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2791127808000).

1381091637240 is an abundant number, since it is smaller than the sum of its proper divisors (4201163978760).

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

1381091637240 is an equidigital number, since it uses as much as digits as its factorization.

1381091637240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 1381091637240 in words is "one trillion, three hundred eighty-one billion, ninety-one million, six hundred thirty-seven thousand, two hundred forty".