1564778480 has 40 divisors (see below), whose sum is σ = 3642421632. Its totient is φ = 625169664.

The previous prime is 1564778401. The next prime is 1564778521. The reversal of 1564778480 is 848774651.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1564778480² = 4897063382942220800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59009 + ... + 81311.

Almost surely, 2^1564778480 is an apocalyptic number.

1564778480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1564778480 is an abundant number, since it is smaller than the sum of its proper divisors (2077643152).

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

1564778480 is a wasteful number, since it uses less digits than its factorization.

1564778480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23193 (or 23187 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 50.

The square root of 1564778480 is about 39557.2809985722. The cubic root of 1564778480 is about 1160.9609753825.

The spelling of 1564778480 in words is "one billion, five hundred sixty-four million, seven hundred seventy-eight thousand, four hundred eighty".