1612105653421 has 4 divisors (see below), whose sum is σ = 1618850865600. Its totient is φ = 1605360441244.

The previous prime is 1612105653383. The next prime is 1612105653511. The reversal of 1612105653421 is 1243565012161.

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 1612105653421 - 2⁷ = 1612105653293 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 (1612105653121) 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, 3372605731 + ... + 3372606208.

It is an arithmetic number, because the mean of its divisors is an integer number (404712716400).

Almost surely, 2^{1612105653421} is an apocalyptic number.

It is an amenable number.

1612105653421 is a deficient number, since it is larger than the sum of its proper divisors (6745212179).

1612105653421 is an equidigital number, since it uses as much as digits as its factorization.

1612105653421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6745212178.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 1612105653421 in words is "one trillion, six hundred twelve billion, one hundred five million, six hundred fifty-three thousand, four hundred twenty-one".