64561854361 has 8 divisors (see below), whose sum is σ = 65424300480. Its totient is φ = 63701422512.

The previous prime is 64561854359. The next prime is 64561854367. The reversal of 64561854361 is 16345816546.

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 64561854361 - 2¹ = 64561854359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64561854367) 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, 438981 + ... + 567298.

It is an arithmetic number, because the mean of its divisors is an integer number (8178037560).

Almost surely, 2^64561854361 is an apocalyptic number.

It is an amenable number.

64561854361 is a deficient number, since it is larger than the sum of its proper divisors (862446119).

64561854361 is a wasteful number, since it uses less digits than its factorization.

64561854361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007135.

The product of its digits is 2073600, while the sum is 49.

The spelling of 64561854361 in words is "sixty-four billion, five hundred sixty-one million, eight hundred fifty-four thousand, three hundred sixty-one".