64744220132461 has 8 divisors (see below), whose sum is σ = 66286648911744. Its totient is φ = 63208661860800.

The previous prime is 64744220132441. The next prime is 64744220132489. The reversal of 64744220132461 is 16423102244746.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64744220132461 - 2⁵ = 64744220132429 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 (64744220132411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1717607835 + ... + 1717645528.

It is an arithmetic number, because the mean of its divisors is an integer number (8285831113968).

Almost surely, 2^{64744220132461} is an apocalyptic number.

It is an amenable number.

64744220132461 is a deficient number, since it is larger than the sum of its proper divisors (1542428779283).

64744220132461 is a wasteful number, since it uses less digits than its factorization.

64744220132461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435253811.

The product of its (nonzero) digits is 1548288, while the sum is 46.

The spelling of 64744220132461 in words is "sixty-four trillion, seven hundred forty-four billion, two hundred twenty million, one hundred thirty-two thousand, four hundred sixty-one".