5551405949 has 2 divisors, whose sum is σ = 5551405950. Its totient is φ = 5551405948.

The previous prime is 5551405943. The next prime is 5551405973. The reversal of 5551405949 is 9495041555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5364537049 + 186868900 = 73243^2 + 13670^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551405949 - 2¹² = 5551401853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5551405943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775702974 + 2775702975.

It is an arithmetic number, because the mean of its divisors is an integer number (2775702975).

Almost surely, 2^5551405949 is an apocalyptic number.

It is an amenable number.

5551405949 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551405949 is an equidigital number, since it uses as much as digits as its factorization.

5551405949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810000, while the sum is 47.

The square root of 5551405949 is about 74507.7576430804. The cubic root of 5551405949 is about 1770.6565439733.

The spelling of 5551405949 in words is "five billion, five hundred fifty-one million, four hundred five thousand, nine hundred forty-nine".