1261793498406 has 16 divisors (see below), whose sum is σ = 2884099425024. Its totient is φ = 360512428104.

The previous prime is 1261793498393. The next prime is 1261793498417. The reversal of 1261793498406 is 6048943971621.

It is a self number, because there is not a number n which added to its sum of digits gives 1261793498406.

It is a congruent number.

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, 15021351130 + ... + 15021351213.

It is an arithmetic number, because the mean of its divisors is an integer number (180256214064).

Almost surely, 2^{1261793498406} is an apocalyptic number.

1261793498406 is an abundant number, since it is smaller than the sum of its proper divisors (1622305926618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261793498406 is a wasteful number, since it uses less digits than its factorization.

1261793498406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30042702355.

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 1261793498406 in words is "one trillion, two hundred sixty-one billion, seven hundred ninety-three million, four hundred ninety-eight thousand, four hundred six".