2578305805497 has 64 divisors (see below), whose sum is σ = 3934493222400. Its totient is φ = 1667972217600.

The previous prime is 2578305805429. The next prime is 2578305805531. The reversal of 2578305805497 is 7945085038752.

2578305805497 is a `hidden beast` number, since 2 + 5 + 7 + 8 + 3 + 0 + 5 + 80 + 549 + 7 = 666.

It is not a de Polignac number, because 2578305805497 - 2¹⁴ = 2578305789113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2578305805897) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 122178247 + ... + 122199347.

It is an arithmetic number, because the mean of its divisors is an integer number (61476456600).

Almost surely, 2^{2578305805497} is an apocalyptic number.

2578305805497 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2578305805497 is a deficient number, since it is larger than the sum of its proper divisors (1356187416903).

2578305805497 is a wasteful number, since it uses less digits than its factorization.

2578305805497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22095 (or 22089 counting only the distinct ones).

The product of its (nonzero) digits is 84672000, while the sum is 63.

The spelling of 2578305805497 in words is "two trillion, five hundred seventy-eight billion, three hundred five million, eight hundred five thousand, four hundred ninety-seven".