1020655555 has 8 divisors (see below), whose sum is σ = 1243067472. Its totient is φ = 804337248.

The previous prime is 1020655553. The next prime is 1020655583. The reversal of 1020655555 is 5555560201.

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 1020655555 - 2¹ = 1020655553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020655555.

It is not an unprimeable number, because it can be changed into a prime (1020655553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1523032 + ... + 1523701.

It is an arithmetic number, because the mean of its divisors is an integer number (155383434).

Almost surely, 2^1020655555 is an apocalyptic number.

1020655555 is a deficient number, since it is larger than the sum of its proper divisors (222411917).

1020655555 is an equidigital number, since it uses as much as digits as its factorization.

1020655555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046805.

The product of its (nonzero) digits is 37500, while the sum is 34.

The square root of 1020655555 is about 31947.7003084729. The cubic root of 1020655555 is about 1006.8383158440.

The spelling of 1020655555 in words is "one billion, twenty million, six hundred fifty-five thousand, five hundred fifty-five".