1564640354 has 8 divisors (see below), whose sum is σ = 2348573520. Its totient is φ = 781782516.

The previous prime is 1564640353. The next prime is 1564640359. The reversal of 1564640354 is 4530464651.

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

It is not an unprimeable number, because it can be changed into a prime (1564640353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265184 + ... + 271019.

It is an arithmetic number, because the mean of its divisors is an integer number (293571690).

Almost surely, 2^1564640354 is an apocalyptic number.

1564640354 is a deficient number, since it is larger than the sum of its proper divisors (783933166).

1564640354 is a wasteful number, since it uses less digits than its factorization.

1564640354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537664.

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 1564640354 is about 39555.5350614803. The cubic root of 1564640354 is about 1160.9268142928.

The spelling of 1564640354 in words is "one billion, five hundred sixty-four million, six hundred forty thousand, three hundred fifty-four".