1985262608738 has 4 divisors (see below), whose sum is σ = 2977893913110. Its totient is φ = 992631304368.

The previous prime is 1985262608689. The next prime is 1985262608743. The reversal of 1985262608738 is 8378062625891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1653402507409 + 331860101329 = 1285847^2 + 576073^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 496315652183 + ... + 496315652186.

Almost surely, 2^{1985262608738} is an apocalyptic number.

1985262608738 is a deficient number, since it is larger than the sum of its proper divisors (992631304372).

1985262608738 is an equidigital number, since it uses as much as digits as its factorization.

1985262608738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992631304371.

The product of its (nonzero) digits is 69672960, while the sum is 65.

The spelling of 1985262608738 in words is "one trillion, nine hundred eighty-five billion, two hundred sixty-two million, six hundred eight thousand, seven hundred thirty-eight".