64646226547 has 8 divisors (see below), whose sum is σ = 73907015936. Its totient is φ = 55391840712.

The previous prime is 64646226539. The next prime is 64646226599. The reversal of 64646226547 is 74562264646.

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 64646226547 - 2³ = 64646226539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64646226494 and 64646226503.

It is not an unprimeable number, because it can be changed into a prime (64646256547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1579233 + ... + 1619650.

It is an arithmetic number, because the mean of its divisors is an integer number (9238376992).

Almost surely, 2^64646226547 is an apocalyptic number.

64646226547 is a deficient number, since it is larger than the sum of its proper divisors (9260789389).

64646226547 is a wasteful number, since it uses less digits than its factorization.

64646226547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3201777.

The product of its digits is 11612160, while the sum is 52.

The spelling of 64646226547 in words is "sixty-four billion, six hundred forty-six million, two hundred twenty-six thousand, five hundred forty-seven".