1564140349 has 8 divisors (see below), whose sum is σ = 1568663712. Its totient is φ = 1559624880.

The previous prime is 1564140341. The next prime is 1564140353. The reversal of 1564140349 is 9430414651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1564140349 - 2³ = 1564140341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1564140341) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 696222 + ... + 698464.

It is an arithmetic number, because the mean of its divisors is an integer number (196082964).

Almost surely, 2^1564140349 is an apocalyptic number.

It is an amenable number.

1564140349 is a deficient number, since it is larger than the sum of its proper divisors (4523363).

1564140349 is a wasteful number, since it uses less digits than its factorization.

1564140349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1564140349 is about 39549.2142652670. The cubic root of 1564140349 is about 1160.8031370839.

The spelling of 1564140349 in words is "one billion, five hundred sixty-four million, one hundred forty thousand, three hundred forty-nine".