1564343442 has 80 divisors (see below), whose sum is σ = 3596104512. Its totient is φ = 508079520.

The previous prime is 1564343381. The next prime is 1564343453. The reversal of 1564343442 is 2443434651.

1564343442 is a `hidden beast` number, since 1 + 5 + 643 + 4 + 3 + 4 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1564343397 and 1564343406.

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 39 ways as a sum of consecutive naturals, for example, 1433317 + ... + 1434407.

Almost surely, 2^1564343442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1564343442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1798052256).

1564343442 is an abundant number, since it is smaller than the sum of its proper divisors (2031761070).

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

1564343442 is a wasteful number, since it uses less digits than its factorization.

1564343442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325 (or 1316 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 1564343442 is about 39551.7817803446. The cubic root of 1564343442 is about 1160.8533757105.

The spelling of 1564343442 in words is "one billion, five hundred sixty-four million, three hundred forty-three thousand, four hundred forty-two".