1565020650 has 24 divisors (see below), whose sum is σ = 3881251584. Its totient is φ = 417338800.

The previous prime is 1565020649. The next prime is 1565020657. The reversal of 1565020650 is 560205651.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1565020657) 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, 5216586 + ... + 5216885.

It is an arithmetic number, because the mean of its divisors is an integer number (161718816).

Almost surely, 2^1565020650 is an apocalyptic number.

1565020650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1565020650 is an abundant number, since it is smaller than the sum of its proper divisors (2316230934).

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

1565020650 is a wasteful number, since it uses less digits than its factorization.

1565020650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10433486 (or 10433481 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 1565020650 is about 39560.3418842659. The cubic root of 1565020650 is about 1161.0208636075.

The spelling of 1565020650 in words is "one billion, five hundred sixty-five million, twenty thousand, six hundred fifty".