64244121014905 has 16 divisors (see below), whose sum is σ = 83035329788880. Its totient is φ = 47434865004288.

The previous prime is 64244121014897. The next prime is 64244121014917. The reversal of 64244121014905 is 50941012144246.

It can be written as a sum of positive squares in 8 ways, for example, as 7477058205241 + 56767062809664 = 2734421^2 + 7534392^2 .

It is a cyclic number.

It is not a de Polignac number, because 64244121014905 - 2³ = 64244121014897 is a prime.

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, 71921842 + ... + 72809611.

It is an arithmetic number, because the mean of its divisors is an integer number (5189708111805).

Almost surely, 2^{64244121014905} is an apocalyptic number.

64244121014905 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64244121014905 is a deficient number, since it is larger than the sum of its proper divisors (18791208773975).

64244121014905 is a wasteful number, since it uses less digits than its factorization.

64244121014905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144738300.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 64244121014905 in words is "sixty-four trillion, two hundred forty-four billion, one hundred twenty-one million, fourteen thousand, nine hundred five".