64501655423511 has 4 divisors (see below), whose sum is σ = 86002207231352. Its totient is φ = 43001103615672.

The previous prime is 64501655423497. The next prime is 64501655423539. The reversal of 64501655423511 is 11532455610546.

64501655423511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 64501655423511 - 2¹⁵ = 64501655390743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64501655423411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10750275903916 + ... + 10750275903921.

It is an arithmetic number, because the mean of its divisors is an integer number (21500551807838).

Almost surely, 2^{64501655423511} is an apocalyptic number.

64501655423511 is a deficient number, since it is larger than the sum of its proper divisors (21500551807841).

64501655423511 is a wasteful number, since it uses less digits than its factorization.

64501655423511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21500551807840.

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 64501655423511 in words is "sixty-four trillion, five hundred one billion, six hundred fifty-five million, four hundred twenty-three thousand, five hundred eleven".