1349845819840 has 56 divisors (see below), whose sum is σ = 3673508987232. Its totient is φ = 462804280320.

The previous prime is 1349845819837. The next prime is 1349845819841. The reversal of 1349845819840 is 489185489431.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1349845819841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301302631 + ... + 301307110.

It is an arithmetic number, because the mean of its divisors is an integer number (65598374772).

Almost surely, 2^{1349845819840} is an apocalyptic number.

1349845819840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1349845819840 is an abundant number, since it is smaller than the sum of its proper divisors (2323663167392).

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

1349845819840 is an equidigital number, since it uses as much as digits as its factorization.

1349845819840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602609765 (or 602609755 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 64.

The spelling of 1349845819840 in words is "one trillion, three hundred forty-nine billion, eight hundred forty-five million, eight hundred nineteen thousand, eight hundred forty".