1055478557 has 16 divisors (see below), whose sum is σ = 1272182400. Its totient is φ = 855437760.

The previous prime is 1055478527. The next prime is 1055478563. The reversal of 1055478557 is 7558745501.

It is not a de Polignac number, because 1055478557 - 2⁶ = 1055478493 is a prime.

It is a super-2 number, since 2×1055478557² = 2228069968573604498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055478527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64619 + ... + 79287.

It is an arithmetic number, because the mean of its divisors is an integer number (79511400).

Almost surely, 2^1055478557 is an apocalyptic number.

It is an amenable number.

1055478557 is a deficient number, since it is larger than the sum of its proper divisors (216703843).

1055478557 is a wasteful number, since it uses less digits than its factorization.

1055478557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15236.

The product of its (nonzero) digits is 980000, while the sum is 47.

The square root of 1055478557 is about 32488.1294783187. The cubic root of 1055478557 is about 1018.1610325860.

The spelling of 1055478557 in words is "one billion, fifty-five million, four hundred seventy-eight thousand, five hundred fifty-seven".