1988276521137 has 4 divisors (see below), whose sum is σ = 2651035361520. Its totient is φ = 1325517680756.

The previous prime is 1988276521069. The next prime is 1988276521139. The reversal of 1988276521137 is 7311256728891.

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 a de Polignac number, because none of the positive numbers 2^k-1988276521137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1988276521139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331379420187 + ... + 331379420192.

It is an arithmetic number, because the mean of its divisors is an integer number (662758840380).

Almost surely, 2^{1988276521137} is an apocalyptic number.

It is an amenable number.

1988276521137 is a deficient number, since it is larger than the sum of its proper divisors (662758840383).

1988276521137 is an equidigital number, since it uses as much as digits as its factorization.

1988276521137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662758840382.

The product of its digits is 10160640, while the sum is 60.

The spelling of 1988276521137 in words is "one trillion, nine hundred eighty-eight billion, two hundred seventy-six million, five hundred twenty-one thousand, one hundred thirty-seven".