1020664915 has 4 divisors (see below), whose sum is σ = 1224797904. Its totient is φ = 816531928.

The previous prime is 1020664913. The next prime is 1020664927. The reversal of 1020664915 is 5194660201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1020664915 - 2¹ = 1020664913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020664913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102066487 + ... + 102066496.

It is an arithmetic number, because the mean of its divisors is an integer number (306199476).

Almost surely, 2^1020664915 is an apocalyptic number.

1020664915 is a deficient number, since it is larger than the sum of its proper divisors (204132989).

1020664915 is an equidigital number, since it uses as much as digits as its factorization.

1020664915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204132988.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1020664915 is about 31947.8467975543. The cubic root of 1020664915 is about 1006.8413935973.

The spelling of 1020664915 in words is "one billion, twenty million, six hundred sixty-four thousand, nine hundred fifteen".