1461999246991 has 4 divisors (see below), whose sum is σ = 1538946575800. Its totient is φ = 1385051918184.

The previous prime is 1461999246977. The next prime is 1461999247013. The reversal of 1461999246991 is 1996429991641.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1461999246991 - 2⁷ = 1461999246863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1461999246991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1461999246901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38473664376 + ... + 38473664413.

It is an arithmetic number, because the mean of its divisors is an integer number (384736643950).

Almost surely, 2^{1461999246991} is an apocalyptic number.

1461999246991 is a deficient number, since it is larger than the sum of its proper divisors (76947328809).

1461999246991 is an equidigital number, since it uses as much as digits as its factorization.

1461999246991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76947328808.

The product of its digits is 68024448, while the sum is 70.

The spelling of 1461999246991 in words is "one trillion, four hundred sixty-one billion, nine hundred ninety-nine million, two hundred forty-six thousand, nine hundred ninety-one".