1020655550 has 24 divisors (see below), whose sum is σ = 1915230096. Its totient is φ = 404647040.

The previous prime is 1020655499. The next prime is 1020655553. The reversal of 1020655550 is 555560201.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 84674 + ... + 95973.

It is an arithmetic number, because the mean of its divisors is an integer number (79801254).

Almost surely, 2^1020655550 is an apocalyptic number.

1020655550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020655550 is a deficient number, since it is larger than the sum of its proper divisors (894574546).

1020655550 is a wasteful number, since it uses less digits than its factorization.

1020655550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180772 (or 180767 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 1020655550 is about 31947.7002302200. The cubic root of 1020655550 is about 1006.8383141999.

It can be divided in two parts, 10206 and 55550, that added together give a palindrome (65756).

The spelling of 1020655550 in words is "one billion, twenty million, six hundred fifty-five thousand, five hundred fifty".