1461662661642 has 8 divisors (see below), whose sum is σ = 2923325323296. Its totient is φ = 487220887212.

The previous prime is 1461662661637. The next prime is 1461662661647. The reversal of 1461662661642 is 2461662661641.

It is an interprime number because it is at equal distance from previous prime (1461662661637) and next prime (1461662661647).

It is a sphenic number, since it is the product of 3 distinct primes.

1461662661642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1461662661647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 121805221798 + ... + 121805221809.

It is an arithmetic number, because the mean of its divisors is an integer number (365415665412).

Almost surely, 2^{1461662661642} is an apocalyptic number.

1461662661642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1461662661642 is a wasteful number, since it uses less digits than its factorization.

1461662661642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243610443612.

The product of its digits is 2985984, while the sum is 51.

Subtracting 1461662661642 from its reverse (2461662661641), we obtain a palindrome (999999999999).

The spelling of 1461662661642 in words is "one trillion, four hundred sixty-one billion, six hundred sixty-two million, six hundred sixty-one thousand, six hundred forty-two".