64420144102445 has 16 divisors (see below), whose sum is σ = 79798129827840. Its totient is φ = 49873488758400.

The previous prime is 64420144102441. The next prime is 64420144102459. The reversal of 64420144102445 is 54420144102446.

It is a happy number.

It is not a de Polignac number, because 64420144102445 - 2² = 64420144102441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64420144102441) 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, 62737076 + ... + 63755634.

It is an arithmetic number, because the mean of its divisors is an integer number (4987383114240).

Almost surely, 2^{64420144102445} is an apocalyptic number.

It is an amenable number.

64420144102445 is a deficient number, since it is larger than the sum of its proper divisors (15377985725395).

64420144102445 is a wasteful number, since it uses less digits than its factorization.

64420144102445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426636.

The product of its (nonzero) digits is 491520, while the sum is 41.

Subtracting from 64420144102445 its reverse (54420144102446), we obtain a palindrome (9999999999999).

The spelling of 64420144102445 in words is "sixty-four trillion, four hundred twenty billion, one hundred forty-four million, one hundred two thousand, four hundred forty-five".