1055801565 has 96 divisors (see below), whose sum is σ = 2325313536. Its totient is φ = 431101440.

The previous prime is 1055801563. The next prime is 1055801567. The reversal of 1055801565 is 5651085501.

1055801565 is a `hidden beast` number, since 1 + 0 + 5 + 580 + 15 + 65 = 666.

It is an interprime number because it is at equal distance from previous prime (1055801563) and next prime (1055801567).

It is not a de Polignac number, because 1055801565 - 2¹ = 1055801563 is a prime.

It is a super-2 number, since 2×1055801565² = 2229433889312898450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055801563) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 122787 + ... + 131103.

It is an arithmetic number, because the mean of its divisors is an integer number (24222016).

Almost surely, 2^1055801565 is an apocalyptic number.

1055801565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1055801565 is an abundant number, since it is smaller than the sum of its proper divisors (1269511971).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1055801565 is a wasteful number, since it uses less digits than its factorization.

1055801565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8379 (or 8376 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 36.

The square root of 1055801565 is about 32493.1002675953. The cubic root of 1055801565 is about 1018.2648845667.

The spelling of 1055801565 in words is "one billion, fifty-five million, eight hundred one thousand, five hundred sixty-five".