1394165945520 has 320 divisors, whose sum is σ = 4975685107200. Its totient is φ = 358578754560.

The previous prime is 1394165945519. The next prime is 1394165945611. The reversal of 1394165945520 is 255495614931.

It is a happy number.

1394165945520 is a `hidden beast` number, since 1 + 3 + 9 + 4 + 165 + 9 + 455 + 20 = 666.

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 63 ways as a sum of consecutive naturals, for example, 6651115 + ... + 6857525.

It is an arithmetic number, because the mean of its divisors is an integer number (15549015960).

Almost surely, 2^{1394165945520} is an apocalyptic number.

1394165945520 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 1394165945520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2487842553600).

1394165945520 is an abundant number, since it is smaller than the sum of its proper divisors (3581519161680).

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

1394165945520 is a wasteful number, since it uses less digits than its factorization.

1394165945520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206545 (or 206533 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 1394165945520 in words is "one trillion, three hundred ninety-four billion, one hundred sixty-five million, nine hundred forty-five thousand, five hundred twenty".