3554255221561 has 8 divisors (see below), whose sum is σ = 3924084626784. Its totient is φ = 3192211698720.

The previous prime is 3554255221553. The next prime is 3554255221579. The reversal of 3554255221561 is 1651225524553.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3554255221561 - 2³ = 3554255221553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3554255224561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1946469636 + ... + 1946471461.

It is an arithmetic number, because the mean of its divisors is an integer number (490510578348).

Almost surely, 2^{3554255221561} is an apocalyptic number.

It is an amenable number.

3554255221561 is a deficient number, since it is larger than the sum of its proper divisors (369829405223).

3554255221561 is a wasteful number, since it uses less digits than its factorization.

3554255221561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892941191.

The product of its digits is 1800000, while the sum is 46.

The spelling of 3554255221561 in words is "three trillion, five hundred fifty-four billion, two hundred fifty-five million, two hundred twenty-one thousand, five hundred sixty-one".