64401907786 has 8 divisors (see below), whose sum is σ = 101687222880. Its totient is φ = 30506166828.

The previous prime is 64401907783. The next prime is 64401907831. The reversal of 64401907786 is 68770910446.

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

It is not an unprimeable number, because it can be changed into a prime (64401907783) 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 3 ways as a sum of consecutive naturals, for example, 847393486 + ... + 847393561.

It is an arithmetic number, because the mean of its divisors is an integer number (12710902860).

Almost surely, 2^64401907786 is an apocalyptic number.

64401907786 is a deficient number, since it is larger than the sum of its proper divisors (37285315094).

64401907786 is a wasteful number, since it uses less digits than its factorization.

64401907786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694787068.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 64401907786 in words is "sixty-four billion, four hundred one million, nine hundred seven thousand, seven hundred eighty-six".