16564746540 has 48 divisors (see below), whose sum is σ = 46649419488. Its totient is φ = 4391729664.

The previous prime is 16564746469. The next prime is 16564746547. The reversal of 16564746540 is 4564746561.

It is a self number, because there is not a number n which added to its sum of digits gives 16564746540.

It is not an unprimeable number, because it can be changed into a prime (16564746547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 787537 + ... + 808296.

It is an arithmetic number, because the mean of its divisors is an integer number (971862906).

Almost surely, 2^16564746540 is an apocalyptic number.

16564746540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16564746540 is an abundant number, since it is smaller than the sum of its proper divisors (30084672948).

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

16564746540 is a wasteful number, since it uses less digits than its factorization.

16564746540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596018 (or 1596016 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 16564746540 in words is "sixteen billion, five hundred sixty-four million, seven hundred forty-six thousand, five hundred forty".