1055715557 has 4 divisors (see below), whose sum is σ = 1136924460. Its totient is φ = 974506656.

The previous prime is 1055715547. The next prime is 1055715569. The reversal of 1055715557 is 7555175501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7555175501 = 3187 ⋅2370623.

It can be written as a sum of positive squares in 2 ways, for example, as 291248356 + 764467201 = 17066^2 + 27649^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055715557 - 2⁸ = 1055715301 is a prime.

It is a super-2 number, since 2×1055715557² = 2229070674583640498, 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 (1055715527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40604432 + ... + 40604457.

It is an arithmetic number, because the mean of its divisors is an integer number (284231115).

Almost surely, 2^1055715557 is an apocalyptic number.

It is an amenable number.

1055715557 is a deficient number, since it is larger than the sum of its proper divisors (81208903).

1055715557 is an equidigital number, since it uses as much as digits as its factorization.

1055715557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81208902.

The product of its (nonzero) digits is 153125, while the sum is 41.

The square root of 1055715557 is about 32491.7767596664. The cubic root of 1055715557 is about 1018.2372337570.

The spelling of 1055715557 in words is "one billion, fifty-five million, seven hundred fifteen thousand, five hundred fifty-seven".