64528843555 has 16 divisors (see below), whose sum is σ = 84520389888. Its totient is φ = 46904364000.

The previous prime is 64528843549. The next prime is 64528843571. The reversal of 64528843555 is 55534882546.

It is not a de Polignac number, because 64528843555 - 2⁵ = 64528843523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a junction number, because it is equal to n+sod(n) for n = 64528843496 and 64528843505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219681 + ... + 421090.

It is an arithmetic number, because the mean of its divisors is an integer number (5282524368).

Almost surely, 2^64528843555 is an apocalyptic number.

64528843555 is a deficient number, since it is larger than the sum of its proper divisors (19991546333).

64528843555 is a wasteful number, since it uses less digits than its factorization.

64528843555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642618.

The product of its digits is 23040000, while the sum is 55.

The spelling of 64528843555 in words is "sixty-four billion, five hundred twenty-eight million, eight hundred forty-three thousand, five hundred fifty-five".