1688748051630 has 32 divisors (see below), whose sum is σ = 4064285030400. Its totient is φ = 449078401952.

The previous prime is 1688748051607. The next prime is 1688748051677. The reversal of 1688748051630 is 361508478861.

It is a happy number.

It is a super-2 number, since 2×1688748051630² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 78389790 + ... + 78411329.

It is an arithmetic number, because the mean of its divisors is an integer number (127008907200).

Almost surely, 2^{1688748051630} is an apocalyptic number.

1688748051630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1688748051630 is an abundant number, since it is smaller than the sum of its proper divisors (2375536978770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1688748051630 is a wasteful number, since it uses less digits than its factorization.

1688748051630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156801488.

The product of its (nonzero) digits is 7741440, while the sum is 57.

It can be divided in two parts, 16887480 and 51630, that added together give a triangular number (16939110 = T₅₈₂₀).

The spelling of 1688748051630 in words is "one trillion, six hundred eighty-eight billion, seven hundred forty-eight million, fifty-one thousand, six hundred thirty".