1964037985 has 16 divisors (see below), whose sum is σ = 2900733696. Its totient is φ = 1243171008.

The previous prime is 1964037949. The next prime is 1964037989. The reversal of 1964037985 is 5897304691.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1964037985 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1964037989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2157829 + ... + 2158738.

It is an arithmetic number, because the mean of its divisors is an integer number (181295856).

Almost surely, 2^1964037985 is an apocalyptic number.

It is an amenable number.

1964037985 is a deficient number, since it is larger than the sum of its proper divisors (936695711).

1964037985 is a wasteful number, since it uses less digits than its factorization.

1964037985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4316592.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 1964037985 is about 44317.4681700117. The cubic root of 1964037985 is about 1252.3237808238.

The spelling of 1964037985 in words is "one billion, nine hundred sixty-four million, thirty-seven thousand, nine hundred eighty-five".