1020565655 has 8 divisors (see below), whose sum is σ = 1253159952. Its totient is φ = 797465088.

The previous prime is 1020565643. The next prime is 1020565681. The reversal of 1020565655 is 5565650201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020565655 - 2¹² = 1020561559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2373194 + ... + 2373623.

It is an arithmetic number, because the mean of its divisors is an integer number (156644994).

Almost surely, 2^1020565655 is an apocalyptic number.

1020565655 is a deficient number, since it is larger than the sum of its proper divisors (232594297).

1020565655 is an equidigital number, since it uses as much as digits as its factorization.

1020565655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746865.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 1020565655 is about 31946.2932904586. The cubic root of 1020565655 is about 1006.8087539865.

The spelling of 1020565655 in words is "one billion, twenty million, five hundred sixty-five thousand, six hundred fifty-five".