2506694578 has 4 divisors (see below), whose sum is σ = 3760041870. Its totient is φ = 1253347288.

The previous prime is 2506694551. The next prime is 2506694579. The reversal of 2506694578 is 8754966052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2286082969 + 220611609 = 47813^2 + 14853^2 .

It is not an unprimeable number, because it can be changed into a prime (2506694579) by changing a digit.

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 as a sum of consecutive naturals, namely, 626673643 + ... + 626673646.

Almost surely, 2^2506694578 is an apocalyptic number.

2506694578 is a deficient number, since it is larger than the sum of its proper divisors (1253347292).

2506694578 is a wasteful number, since it uses less digits than its factorization.

2506694578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253347291.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The square root of 2506694578 is about 50066.9010225318. The cubic root of 2506694578 is about 1358.4191872399.

The spelling of 2506694578 in words is "two billion, five hundred six million, six hundred ninety-four thousand, five hundred seventy-eight".