1564417540 has 24 divisors (see below), whose sum is σ = 3754602432. Its totient is φ = 536371680.

The previous prime is 1564417523. The next prime is 1564417541. The reversal of 1564417540 is 457144651.

It is a self number, because there is not a number n which added to its sum of digits gives 1564417540.

It is not an unprimeable number, because it can be changed into a prime (1564417541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5587066 + ... + 5587345.

It is an arithmetic number, because the mean of its divisors is an integer number (156441768).

Almost surely, 2^1564417540 is an apocalyptic number.

1564417540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1564417540 is an abundant number, since it is smaller than the sum of its proper divisors (2190184892).

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

1564417540 is a wasteful number, since it uses less digits than its factorization.

1564417540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11174427 (or 11174425 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 1564417540 is about 39552.7184906423. The cubic root of 1564417540 is about 1160.8717040718.

The spelling of 1564417540 in words is "one billion, five hundred sixty-four million, four hundred seventeen thousand, five hundred forty".