1699150681985 has 16 divisors (see below), whose sum is σ = 2097768834000. Its totient is φ = 1320257673216.

The previous prime is 1699150681981. The next prime is 1699150682017. The reversal of 1699150681985 is 5891860519961.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 67108864 + 1699083573121 = 8192^2 + 1303489^2 .

It is a cyclic number.

It is not a de Polignac number, because 1699150681985 - 2² = 1699150681981 is a prime.

It is a super-2 number, since 2×1699150681985² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1699150681981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7965560 + ... + 8176089.

It is an arithmetic number, because the mean of its divisors is an integer number (131110552125).

Almost surely, 2^{1699150681985} is an apocalyptic number.

It is an amenable number.

1699150681985 is a deficient number, since it is larger than the sum of its proper divisors (398618152015).

1699150681985 is a wasteful number, since it uses less digits than its factorization.

1699150681985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16142260.

The product of its (nonzero) digits is 41990400, while the sum is 68.

The spelling of 1699150681985 in words is "one trillion, six hundred ninety-nine billion, one hundred fifty million, six hundred eighty-one thousand, nine hundred eighty-five".