634971251428 has 24 divisors (see below), whose sum is σ = 1176606573912. Its totient is φ = 298799284224.

The previous prime is 634971251423. The next prime is 634971251429. The reversal of 634971251428 is 824152179436.

It can be written as a sum of positive squares in 4 ways, for example, as 26458926244 + 608512325184 = 162662^2 + 780072^2 .

It is not an unprimeable number, because it can be changed into a prime (634971251423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1935300 + ... + 2239492.

It is an arithmetic number, because the mean of its divisors is an integer number (49025273913).

Almost surely, 2^634971251428 is an apocalyptic number.

634971251428 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

634971251428 is a deficient number, since it is larger than the sum of its proper divisors (541635322484).

634971251428 is a wasteful number, since it uses less digits than its factorization.

634971251428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334911 (or 334909 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The spelling of 634971251428 in words is "six hundred thirty-four billion, nine hundred seventy-one million, two hundred fifty-one thousand, four hundred twenty-eight".