1355545121644 has 36 divisors (see below), whose sum is σ = 2921826256776. Its totient is φ = 546774501504.

The previous prime is 1355545121587. The next prime is 1355545121681. The reversal of 1355545121644 is 4461215455531.

It is a junction number, because it is equal to n+sod(n) for n = 1355545121594 and 1355545121603.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203409802 + ... + 203416465.

It is an arithmetic number, because the mean of its divisors is an integer number (81161840466).

Almost surely, 2^{1355545121644} is an apocalyptic number.

1355545121644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1355545121644 is an abundant number, since it is smaller than the sum of its proper divisors (1566281135132).

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

1355545121644 is a wasteful number, since it uses less digits than its factorization.

1355545121644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406826302 (or 406826293 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 46.

The spelling of 1355545121644 in words is "one trillion, three hundred fifty-five billion, five hundred forty-five million, one hundred twenty-one thousand, six hundred forty-four".