1023604554564 has 18 divisors (see below), whose sum is σ = 2587444846350. Its totient is φ = 341201518176.

The previous prime is 1023604554559. The next prime is 1023604554589. The reversal of 1023604554564 is 4654554063201.

1023604554564 is a `hidden beast` number, since 1 + 0 + 2 + 3 + 6 + 0 + 45 + 545 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 749194113600 + 274410440964 = 865560^2 + 523842^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14216729889 + ... + 14216729960.

Almost surely, 2^{1023604554564} is an apocalyptic number.

It is an amenable number.

1023604554564 is an abundant number, since it is smaller than the sum of its proper divisors (1563840291786).

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

1023604554564 is a wasteful number, since it uses less digits than its factorization.

1023604554564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28433459859 (or 28433459854 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 1023604554564 in words is "one trillion, twenty-three billion, six hundred four million, five hundred fifty-four thousand, five hundred sixty-four".