1298106605990 has 16 divisors (see below), whose sum is σ = 2352066012000. Its totient is φ = 515803948800.

The previous prime is 1298106605969. The next prime is 1298106605993. The reversal of 1298106605990 is 995066018921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298106605993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429835115 + ... + 429838134.

It is an arithmetic number, because the mean of its divisors is an integer number (147004125750).

Almost surely, 2^{1298106605990} is an apocalyptic number.

1298106605990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1298106605990 is a deficient number, since it is larger than the sum of its proper divisors (1053959406010).

1298106605990 is a wasteful number, since it uses less digits than its factorization.

1298106605990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859673407.

The product of its (nonzero) digits is 2099520, while the sum is 56.

The spelling of 1298106605990 in words is "one trillion, two hundred ninety-eight billion, one hundred six million, six hundred five thousand, nine hundred ninety".