5257638578 has 8 divisors (see below), whose sum is σ = 8158404780. Its totient is φ = 2538170320.

The previous prime is 5257638571. The next prime is 5257638593. The reversal of 5257638578 is 8758367525.

It can be written as a sum of positive squares in 2 ways, for example, as 5091821449 + 165817129 = 71357^2 + 12877^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (5257638571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45324413 + ... + 45324528.

Almost surely, 2^5257638578 is an apocalyptic number.

5257638578 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

5257638578 is a deficient number, since it is larger than the sum of its proper divisors (2900766202).

5257638578 is a wasteful number, since it uses less digits than its factorization.

5257638578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90648972.

The product of its digits is 14112000, while the sum is 56.

The square root of 5257638578 is about 72509.5757676184. The cubic root of 5257638578 is about 1738.8558314488.

The spelling of 5257638578 in words is "five billion, two hundred fifty-seven million, six hundred thirty-eight thousand, five hundred seventy-eight".