64245456323501 has 4 divisors (see below), whose sum is σ = 64322953859100. Its totient is φ = 64167958787904.

The previous prime is 64245456323437. The next prime is 64245456323561. The reversal of 64245456323501 is 10532365454246.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24502846501225 + 39742609822276 = 4950035^2 + 6304174^2 .

It is a cyclic number.

It is not a de Polignac number, because 64245456323501 - 2⁶ = 64245456323437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64245456323501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64245456323561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38748766556 + ... + 38748768213.

It is an arithmetic number, because the mean of its divisors is an integer number (16080738464775).

Almost surely, 2^{64245456323501} is an apocalyptic number.

It is an amenable number.

64245456323501 is a deficient number, since it is larger than the sum of its proper divisors (77497535599).

64245456323501 is an equidigital number, since it uses as much as digits as its factorization.

64245456323501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77497535598.

The product of its (nonzero) digits is 10368000, while the sum is 50.

The spelling of 64245456323501 in words is "sixty-four trillion, two hundred forty-five billion, four hundred fifty-six million, three hundred twenty-three thousand, five hundred one".