1964508798449 has 4 divisors (see below), whose sum is σ = 1971450525936. Its totient is φ = 1957567070964.

The previous prime is 1964508798433. The next prime is 1964508798589. The reversal of 1964508798449 is 9448978054691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1964508798449 - 2⁴ = 1964508798433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1964508758449) 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, 3470863319 + ... + 3470863884.

It is an arithmetic number, because the mean of its divisors is an integer number (492862631484).

Almost surely, 2^{1964508798449} is an apocalyptic number.

It is an amenable number.

1964508798449 is a deficient number, since it is larger than the sum of its proper divisors (6941727487).

1964508798449 is an equidigital number, since it uses as much as digits as its factorization.

1964508798449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6941727486.

The product of its (nonzero) digits is 627056640, while the sum is 74.

The spelling of 1964508798449 in words is "one trillion, nine hundred sixty-four billion, five hundred eight million, seven hundred ninety-eight thousand, four hundred forty-nine".