64420041604551 has 16 divisors (see below), whose sum is σ = 85933704688128. Its totient is φ = 42926541084000.

The previous prime is 64420041604537. The next prime is 64420041604579. The reversal of 64420041604551 is 15540614002446.

It is a happy number.

It is not a de Polignac number, because 64420041604551 - 2⁶ = 64420041604487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64420041604531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55603950 + ... + 56750676.

It is an arithmetic number, because the mean of its divisors is an integer number (5370856543008).

Almost surely, 2^{64420041604551} is an apocalyptic number.

64420041604551 is a deficient number, since it is larger than the sum of its proper divisors (21513663083577).

64420041604551 is a wasteful number, since it uses less digits than its factorization.

64420041604551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155502.

The product of its (nonzero) digits is 460800, while the sum is 42.

Adding to 64420041604551 its reverse (15540614002446), we get a palindrome (79960655606997).

The spelling of 64420041604551 in words is "sixty-four trillion, four hundred twenty billion, forty-one million, six hundred four thousand, five hundred fifty-one".