5551554557 has 2 divisors, whose sum is σ = 5551554558. Its totient is φ = 5551554556.

The previous prime is 5551554553. The next prime is 5551554599. The reversal of 5551554557 is 7554551555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4890344761 + 661209796 = 69931^2 + 25714^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551554557 - 2² = 5551554553 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5551554553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775777278 + 2775777279.

It is an arithmetic number, because the mean of its divisors is an integer number (2775777279).

Almost surely, 2^5551554557 is an apocalyptic number.

It is an amenable number.

5551554557 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551554557 is an equidigital number, since it uses as much as digits as its factorization.

5551554557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187500, while the sum is 47.

The square root of 5551554557 is about 74508.7549016892. The cubic root of 5551554557 is about 1770.6723436573.

The spelling of 5551554557 in words is "five billion, five hundred fifty-one million, five hundred fifty-four thousand, five hundred fifty-seven".