1084361431661 has 4 divisors (see below), whose sum is σ = 1084376893824. Its totient is φ = 1084345969500.

The previous prime is 1084361431597. The next prime is 1084361431667. The reversal of 1084361431661 is 1661341634801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1084361431661 - 2⁶ = 1084361431597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1084361431667) 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, 7625405 + ... + 7766306.

It is an arithmetic number, because the mean of its divisors is an integer number (271094223456).

Almost surely, 2^{1084361431661} is an apocalyptic number.

It is an amenable number.

1084361431661 is a deficient number, since it is larger than the sum of its proper divisors (15462163).

1084361431661 is an equidigital number, since it uses as much as digits as its factorization.

1084361431661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15462162.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 1084361431661 in words is "one trillion, eighty-four billion, three hundred sixty-one million, four hundred thirty-one thousand, six hundred sixty-one".