2578155034563 has 48 divisors (see below), whose sum is σ = 3882938515456. Its totient is φ = 1646845992000.

The previous prime is 2578155034549. The next prime is 2578155034583. The reversal of 2578155034563 is 3654305518752.

2578155034563 is a `hidden beast` number, since 2 + 5 + 7 + 8 + 1 + 550 + 34 + 56 + 3 = 666.

It is not a de Polignac number, because 2578155034563 - 2¹² = 2578155030467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2578155034583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79924188 + ... + 79956438.

Almost surely, 2^{2578155034563} is an apocalyptic number.

2578155034563 is a deficient number, since it is larger than the sum of its proper divisors (1304783480893).

2578155034563 is a wasteful number, since it uses less digits than its factorization.

2578155034563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35944 (or 35941 counting only the distinct ones).

The product of its (nonzero) digits is 15120000, while the sum is 54.

The spelling of 2578155034563 in words is "two trillion, five hundred seventy-eight billion, one hundred fifty-five million, thirty-four thousand, five hundred sixty-three".