64891862721411 has 16 divisors (see below), whose sum is σ = 95322700240128. Its totient is φ = 38939011532000.

The previous prime is 64891862721383. The next prime is 64891862721541. The reversal of 64891862721411 is 11412726819846.

It is a cyclic number.

It is not a de Polignac number, because 64891862721411 - 2¹⁴ = 64891862705027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64891862721011) 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, 9734749551 + ... + 9734756216.

It is an arithmetic number, because the mean of its divisors is an integer number (5957668765008).

Almost surely, 2^{64891862721411} is an apocalyptic number.

64891862721411 is a deficient number, since it is larger than the sum of its proper divisors (30430837518717).

64891862721411 is a wasteful number, since it uses less digits than its factorization.

64891862721411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19469505882.

The product of its digits is 9289728, while the sum is 60.

The spelling of 64891862721411 in words is "sixty-four trillion, eight hundred ninety-one billion, eight hundred sixty-two million, seven hundred twenty-one thousand, four hundred eleven".