1290691583985 has 16 divisors (see below), whose sum is σ = 2065142923200. Its totient is φ = 688356715200.

The previous prime is 1290691583983. The next prime is 1290691583999. The reversal of 1290691583985 is 5893851960921.

It is not a de Polignac number, because 1290691583985 - 2¹ = 1290691583983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1290691583983) 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, 157191 + ... + 1614339.

It is an arithmetic number, because the mean of its divisors is an integer number (129071432700).

Almost surely, 2^{1290691583985} is an apocalyptic number.

1290691583985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1290691583985 is a deficient number, since it is larger than the sum of its proper divisors (774451339215).

1290691583985 is a wasteful number, since it uses less digits than its factorization.

1290691583985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516208.

The product of its (nonzero) digits is 41990400, while the sum is 66.

The spelling of 1290691583985 in words is "one trillion, two hundred ninety billion, six hundred ninety-one million, five hundred eighty-three thousand, nine hundred eighty-five".