5545156321 has 2 divisors, whose sum is σ = 5545156322. Its totient is φ = 5545156320.

The previous prime is 5545156313. The next prime is 5545156471. The reversal of 5545156321 is 1236515455.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4135904721 + 1409251600 = 64311^2 + 37540^2 .

It is a cyclic number.

It is not a de Polignac number, because 5545156321 - 2³ = 5545156313 is a prime.

It is not a weakly prime, because it can be changed into another prime (5545156921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2772578160 + 2772578161.

It is an arithmetic number, because the mean of its divisors is an integer number (2772578161).

Almost surely, 2^5545156321 is an apocalyptic number.

It is an amenable number.

5545156321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5545156321 is an equidigital number, since it uses as much as digits as its factorization.

5545156321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90000, while the sum is 37.

The square root of 5545156321 is about 74465.8063878986. The cubic root of 5545156321 is about 1769.9918414937.

The spelling of 5545156321 in words is "five billion, five hundred forty-five million, one hundred fifty-six thousand, three hundred twenty-one".