1690720636800 has 384 divisors, whose sum is σ = 6017779524960. Its totient is φ = 414748016640.

The previous prime is 1690720636771. The next prime is 1690720636849. The reversal of 1690720636800 is 86360270961.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1690720636800.

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 47 ways as a sum of consecutive naturals, for example, 36543282 + ... + 36589518.

Almost surely, 2^{1690720636800} is an apocalyptic number.

1690720636800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1690720636800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3008889762480).

1690720636800 is an abundant number, since it is smaller than the sum of its proper divisors (4327058888160).

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

1690720636800 is a wasteful number, since it uses less digits than its factorization.

1690720636800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46570 (or 46553 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 1690720636800 in words is "one trillion, six hundred ninety billion, seven hundred twenty million, six hundred thirty-six thousand, eight hundred".