1293661921898 has 16 divisors (see below), whose sum is σ = 1972647575424. Its totient is φ = 636144025440.

The previous prime is 1293661921873. The next prime is 1293661921907. The reversal of 1293661921898 is 8981291663921.

It is a super-2 number, since 2×1293661921898² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7740818 + ... + 7906173.

It is an arithmetic number, because the mean of its divisors is an integer number (123290473464).

Almost surely, 2^{1293661921898} is an apocalyptic number.

1293661921898 is a deficient number, since it is larger than the sum of its proper divisors (678985653526).

1293661921898 is a wasteful number, since it uses less digits than its factorization.

1293661921898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15647677.

The product of its digits is 20155392, while the sum is 65.

The spelling of 1293661921898 in words is "one trillion, two hundred ninety-three billion, six hundred sixty-one million, nine hundred twenty-one thousand, eight hundred ninety-eight".