64633131400 has 48 divisors (see below), whose sum is σ = 150297606900. Its totient is φ = 25848852480.

The previous prime is 64633131359. The next prime is 64633131443. The reversal of 64633131400 is 413133646.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 27531437476 + 37101693924 = 165926^2 + 192618^2 .

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 in 11 ways as a sum of consecutive naturals, for example, 1313644 + ... + 1361956.

Almost surely, 2^64633131400 is an apocalyptic number.

It is an amenable number.

64633131400 is an abundant number, since it is smaller than the sum of its proper divisors (85664475500).

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

64633131400 is a wasteful number, since it uses less digits than its factorization.

64633131400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55018 (or 55009 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 64633131400 in words is "sixty-four billion, six hundred thirty-three million, one hundred thirty-one thousand, four hundred".