1564642545 has 32 divisors (see below), whose sum is σ = 2538248832. Its totient is φ = 822907392.

The previous prime is 1564642537. The next prime is 1564642553. The reversal of 1564642545 is 5452464651.

It is an interprime number because it is at equal distance from previous prime (1564642537) and next prime (1564642553).

It is not a de Polignac number, because 1564642545 - 2³ = 1564642537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1564642497 and 1564642506.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1091149 + ... + 1092581.

It is an arithmetic number, because the mean of its divisors is an integer number (79320276).

Almost surely, 2^1564642545 is an apocalyptic number.

1564642545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1564642545 is a deficient number, since it is larger than the sum of its proper divisors (973606287).

1564642545 is a wasteful number, since it uses less digits than its factorization.

1564642545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401.

The product of its digits is 576000, while the sum is 42.

The square root of 1564642545 is about 39555.5627567097. The cubic root of 1564642545 is about 1160.9273561829.

The spelling of 1564642545 in words is "one billion, five hundred sixty-four million, six hundred forty-two thousand, five hundred forty-five".