1550739969361 has 4 divisors (see below), whose sum is σ = 1691716330224. Its totient is φ = 1409763608500.

The previous prime is 1550739969341. The next prime is 1550739969379. The reversal of 1550739969361 is 1639699370551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1550739969361 - 2¹⁷ = 1550739838289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1550739969293 and 1550739969302.

It is not an unprimeable number, because it can be changed into a prime (1550739969341) 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 3 ways as a sum of consecutive naturals, for example, 70488180415 + ... + 70488180436.

It is an arithmetic number, because the mean of its divisors is an integer number (422929082556).

Almost surely, 2^{1550739969361} is an apocalyptic number.

1550739969361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1550739969361 is a deficient number, since it is larger than the sum of its proper divisors (140976360863).

1550739969361 is a wasteful number, since it uses less digits than its factorization.

1550739969361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140976360862.

The product of its (nonzero) digits is 41334300, while the sum is 64.

The spelling of 1550739969361 in words is "one trillion, five hundred fifty billion, seven hundred thirty-nine million, nine hundred sixty-nine thousand, three hundred sixty-one".