64561854358 has 8 divisors (see below), whose sum is σ = 101053337328. Its totient is φ = 30877408584.

The previous prime is 64561854349. The next prime is 64561854359. The reversal of 64561854358 is 85345816546.

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

It is a super-3 number, since 3×64561854358³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64561854299 and 64561854308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64561854359) 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, 701759241 + ... + 701759332.

It is an arithmetic number, because the mean of its divisors is an integer number (12631667166).

Almost surely, 2^64561854358 is an apocalyptic number.

64561854358 is a deficient number, since it is larger than the sum of its proper divisors (36491482970).

64561854358 is a wasteful number, since it uses less digits than its factorization.

64561854358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403518598.

The product of its digits is 13824000, while the sum is 55.

It can be divided in two parts, 645 and 61854358, that added together give a triangular number (61855003 = T₁₁₁₂₂).

The spelling of 64561854358 in words is "sixty-four billion, five hundred sixty-one million, eight hundred fifty-four thousand, three hundred fifty-eight".