1555081326841 has 27 divisors (see below), whose sum is σ = 1873806514671. Its totient is φ = 1286754355824.

The previous prime is 1555081326797. The next prime is 1555081326857. The reversal of 1555081326841 is 1486231805551.

The square root of 1555081326841 is 1247029.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 815446926441 + 739634400400 = 903021^2 + 860020^2 .

It is not a de Polignac number, because 1555081326841 - 2²³ = 1555072938233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (1555081326241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 253143816 + ... + 253149958.

Almost surely, 2^{1555081326841} is an apocalyptic number.

1555081326841 is the 1247029-th square number.

1555081326841 is the 623515-th centered octagonal number.

It is an amenable number.

1555081326841 is a deficient number, since it is larger than the sum of its proper divisors (318725187830).

1555081326841 is an frugal number, since it uses more digits than its factorization.

1555081326841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12358 (or 6179 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 49.

Multiplying 1555081326841 by its sum of digits (49), we get a square (76198985015209 = 8729203²).

1555081326841 divided by its sum of digits (49) gives a square (31736353609 = 178147²).

The spelling of 1555081326841 in words is "one trillion, five hundred fifty-five billion, eighty-one million, three hundred twenty-six thousand, eight hundred forty-one".