1564251260340 has 96 divisors (see below), whose sum is σ = 4638629769984. Its totient is φ = 392504555520.

The previous prime is 1564251260333. The next prime is 1564251260359. The reversal of 1564251260340 is 430621524651.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4236330 + ... + 4590750.

It is an arithmetic number, because the mean of its divisors is an integer number (48319060104).

Almost surely, 2^{1564251260340} is an apocalyptic number.

1564251260340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1564251260340 is an abundant number, since it is smaller than the sum of its proper divisors (3074378509644).

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

1564251260340 is a wasteful number, since it uses less digits than its factorization.

1564251260340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358777 (or 358775 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 1564251260340 its reverse (430621524651), we get a palindrome (1994872784991).

The spelling of 1564251260340 in words is "one trillion, five hundred sixty-four billion, two hundred fifty-one million, two hundred sixty thousand, three hundred forty".