1564260963 has 4 divisors (see below), whose sum is σ = 2085681288. Its totient is φ = 1042840640.

The previous prime is 1564260953. The next prime is 1564260977. The reversal of 1564260963 is 3690624651.

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 1564260963 - 2¹³ = 1564252771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1564260953) 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, 260710158 + ... + 260710163.

It is an arithmetic number, because the mean of its divisors is an integer number (521420322).

Almost surely, 2^1564260963 is an apocalyptic number.

1564260963 is a deficient number, since it is larger than the sum of its proper divisors (521420325).

1564260963 is an equidigital number, since it uses as much as digits as its factorization.

1564260963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521420324.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 1564260963 is about 39550.7390954961. The cubic root of 1564260963 is about 1160.8329736032.

The spelling of 1564260963 in words is "one billion, five hundred sixty-four million, two hundred sixty thousand, nine hundred sixty-three".