1023565560 has 64 divisors (see below), whose sum is σ = 3083525280. Its totient is φ = 271810560.

The previous prime is 1023565541. The next prime is 1023565579. The reversal of 1023565560 is 655653201.

It is an interprime number because it is at equal distance from previous prime (1023565541) and next prime (1023565579).

It is a super-2 number, since 2×1023565560² = 2095372911236227200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11224 + ... + 46616.

Almost surely, 2^1023565560 is an apocalyptic number.

1023565560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1023565560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1541762640).

1023565560 is an abundant number, since it is smaller than the sum of its proper divisors (2059959720).

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

1023565560 is a wasteful number, since it uses less digits than its factorization.

1023565560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35648 (or 35644 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 1023565560 is about 31993.2111548685. The cubic root of 1023565560 is about 1007.7942780601.

The spelling of 1023565560 in words is "one billion, twenty-three million, five hundred sixty-five thousand, five hundred sixty".