64306442785 has 64 divisors (see below), whose sum is σ = 87847119360. Its totient is φ = 44834549760.

The previous prime is 64306442773. The next prime is 64306442791. The reversal of 64306442785 is 58724460346.

It is not a de Polignac number, because 64306442785 - 2¹⁹ = 64305918497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54915250 + ... + 54916420.

It is an arithmetic number, because the mean of its divisors is an integer number (1372611240).

Almost surely, 2^64306442785 is an apocalyptic number.

64306442785 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64306442785 is a deficient number, since it is larger than the sum of its proper divisors (23540676575).

64306442785 is a wasteful number, since it uses less digits than its factorization.

64306442785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658.

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 64306442785 in words is "sixty-four billion, three hundred six million, four hundred forty-two thousand, seven hundred eighty-five".