638526954312 has 64 divisors (see below), whose sum is σ = 1910123376000. Its totient is φ = 196469831232.

The previous prime is 638526954301. The next prime is 638526954319. The reversal of 638526954312 is 213459625836.

It is a happy number.

638526954312 is a `hidden beast` number, since 6 + 3 + 85 + 2 + 6 + 9 + 543 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (638526954319) 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 in 15 ways as a sum of consecutive naturals, for example, 113695012 + ... + 113700627.

It is an arithmetic number, because the mean of its divisors is an integer number (29845677750).

Almost surely, 2^638526954312 is an apocalyptic number.

It is an amenable number.

638526954312 is an abundant number, since it is smaller than the sum of its proper divisors (1271596421688).

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

638526954312 is a wasteful number, since it uses less digits than its factorization.

638526954312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227395667 (or 227395657 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 54.

The spelling of 638526954312 in words is "six hundred thirty-eight billion, five hundred twenty-six million, nine hundred fifty-four thousand, three hundred twelve".