64524533488638 has 16 divisors (see below), whose sum is σ = 134659895976576. Its totient is φ = 20573039663000.

The previous prime is 64524533488573. The next prime is 64524533488651. The reversal of 64524533488638 is 83688433542546.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233784541488 + ... + 233784541763.

It is an arithmetic number, because the mean of its divisors is an integer number (8416243498536).

Almost surely, 2^{64524533488638} is an apocalyptic number.

64524533488638 is an abundant number, since it is smaller than the sum of its proper divisors (70135362487938).

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

64524533488638 is a wasteful number, since it uses less digits than its factorization.

64524533488638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467569083279.

The product of its digits is 1592524800, while the sum is 69.

The spelling of 64524533488638 in words is "sixty-four trillion, five hundred twenty-four billion, five hundred thirty-three million, four hundred eighty-eight thousand, six hundred thirty-eight".