1689660862990 has 32 divisors (see below), whose sum is σ = 3220533463104. Its totient is φ = 636060480000.

The previous prime is 1689660862927. The next prime is 1689660862993. The reversal of 1689660862990 is 992680669861.

It is a super-2 number, since 2×1689660862990² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689660862993) 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 15 ways as a sum of consecutive naturals, for example, 1976272 + ... + 2699068.

It is an arithmetic number, because the mean of its divisors is an integer number (100641670722).

Almost surely, 2^{1689660862990} is an apocalyptic number.

1689660862990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1689660862990 is a deficient number, since it is larger than the sum of its proper divisors (1530872600114).

1689660862990 is a wasteful number, since it uses less digits than its factorization.

1689660862990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736572.

The product of its (nonzero) digits is 120932352, while the sum is 70.

The spelling of 1689660862990 in words is "one trillion, six hundred eighty-nine billion, six hundred sixty million, eight hundred sixty-two thousand, nine hundred ninety".