1964908243187 has 16 divisors (see below), whose sum is σ = 2049691392000. Its totient is φ = 1881504952320.

The previous prime is 1964908243147. The next prime is 1964908243217. The reversal of 1964908243187 is 7813428094691.

It is a cyclic number.

It is not a de Polignac number, because 1964908243187 - 2²⁰ = 1964907194611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1964908243147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2429939 + ... + 3135987.

It is an arithmetic number, because the mean of its divisors is an integer number (128105712000).

Almost surely, 2^{1964908243187} is an apocalyptic number.

1964908243187 is a deficient number, since it is larger than the sum of its proper divisors (84783148813).

1964908243187 is a wasteful number, since it uses less digits than its factorization.

1964908243187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707026.

The product of its (nonzero) digits is 20901888, while the sum is 62.

The spelling of 1964908243187 in words is "one trillion, nine hundred sixty-four billion, nine hundred eight million, two hundred forty-three thousand, one hundred eighty-seven".