1564405980 has 48 divisors (see below), whose sum is σ = 4382429184. Its totient is φ = 416975680.

The previous prime is 1564405967. The next prime is 1564406003. The reversal of 1564405980 is 895044651.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154885 + ... + 164675.

It is an arithmetic number, because the mean of its divisors is an integer number (91300608).

Almost surely, 2^1564405980 is an apocalyptic number.

1564405980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1564405980 is an abundant number, since it is smaller than the sum of its proper divisors (2818023204).

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

1564405980 is a wasteful number, since it uses less digits than its factorization.

1564405980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12466 (or 12464 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 1564405980 is about 39552.5723562956. The cubic root of 1564405980 is about 1160.8688447094.

The spelling of 1564405980 in words is "one billion, five hundred sixty-four million, four hundred five thousand, nine hundred eighty".