64501628547 has 4 divisors (see below), whose sum is σ = 86002171400. Its totient is φ = 43001085696.

The previous prime is 64501628501. The next prime is 64501628551. The reversal of 64501628547 is 74582610546.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64501628547 - 2²³ = 64493239939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64501628496 and 64501628505.

It is not an unprimeable number, because it can be changed into a prime (64501629547) 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 3 ways as a sum of consecutive naturals, for example, 10750271422 + ... + 10750271427.

It is an arithmetic number, because the mean of its divisors is an integer number (21500542850).

Almost surely, 2^64501628547 is an apocalyptic number.

64501628547 is a deficient number, since it is larger than the sum of its proper divisors (21500542853).

64501628547 is a wasteful number, since it uses less digits than its factorization.

64501628547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21500542852.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 64501628547 in words is "sixty-four billion, five hundred one million, six hundred twenty-eight thousand, five hundred forty-seven".