31628553472 has 18 divisors (see below), whose sum is σ = 63133558418. Its totient is φ = 15814276608.

The previous prime is 31628553461. The next prime is 31628553487. The reversal of 31628553472 is 27435582613.

It can be written as a sum of positive squares in only one way, i.e., 31490631936 + 137921536 = 177456^2 + 11744^2 .

It is a congruent number.

It is an unprimeable number.

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, 61774263 + ... + 61774774.

Almost surely, 2^31628553472 is an apocalyptic number.

31628553472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31628553472 is a deficient number, since it is larger than the sum of its proper divisors (31505004946).

31628553472 is an equidigital number, since it uses as much as digits as its factorization.

31628553472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123549053 (or 123549039 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The spelling of 31628553472 in words is "thirty-one billion, six hundred twenty-eight million, five hundred fifty-three thousand, four hundred seventy-two".