1688996770761 has 16 divisors (see below), whose sum is σ = 2379654236160. Its totient is φ = 1063407979920.

The previous prime is 1688996770759. The next prime is 1688996770781. The reversal of 1688996770761 is 1670776998861.

It is not a de Polignac number, because 1688996770761 - 2¹ = 1688996770759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1688996770781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154919955 + ... + 154930856.

It is an arithmetic number, because the mean of its divisors is an integer number (148728389760).

Almost surely, 2^{1688996770761} is an apocalyptic number.

It is an amenable number.

1688996770761 is a deficient number, since it is larger than the sum of its proper divisors (690657465399).

1688996770761 is a wasteful number, since it uses less digits than its factorization.

1688996770761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309850916.

The product of its (nonzero) digits is 384072192, while the sum is 75.

The spelling of 1688996770761 in words is "one trillion, six hundred eighty-eight billion, nine hundred ninety-six million, seven hundred seventy thousand, seven hundred sixty-one".