64471506250 has 48 divisors (see below), whose sum is σ = 121069110456. Its totient is φ = 25747480000.

The previous prime is 64471506221. The next prime is 64471506257. The reversal of 64471506250 is 5260517446.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 31222536601 + 33248969649 = 176699^2 + 182343^2 .

It is not an unprimeable number, because it can be changed into a prime (64471506257) 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 23 ways as a sum of consecutive naturals, for example, 4073352 + ... + 4089148.

Almost surely, 2^64471506250 is an apocalyptic number.

64471506250 is a deficient number, since it is larger than the sum of its proper divisors (56597604206).

64471506250 is an equidigital number, since it uses as much as digits as its factorization.

64471506250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16477 (or 16457 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 64471506250 in words is "sixty-four billion, four hundred seventy-one million, five hundred six thousand, two hundred fifty".