1055157779 has 16 divisors (see below), whose sum is σ = 1202863200. Its totient is φ = 918521856.

The previous prime is 1055157769. The next prime is 1055157787. The reversal of 1055157779 is 9777515501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1055157779 is a prime.

It is a super-2 number, since 2×1055157779² = 2226715877168425682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055157739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16334 + ... + 48755.

It is an arithmetic number, because the mean of its divisors is an integer number (75178950).

Almost surely, 2^1055157779 is an apocalyptic number.

1055157779 is a deficient number, since it is larger than the sum of its proper divisors (147705421).

1055157779 is a wasteful number, since it uses less digits than its factorization.

1055157779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65174.

The product of its (nonzero) digits is 385875, while the sum is 47.

The square root of 1055157779 is about 32483.1922538411. The cubic root of 1055157779 is about 1018.0578766132.

The spelling of 1055157779 in words is "one billion, fifty-five million, one hundred fifty-seven thousand, seven hundred seventy-nine".