1626105744421 has 4 divisors (see below), whose sum is σ = 1626136503532. Its totient is φ = 1626074985312.

The previous prime is 1626105744409. The next prime is 1626105744437. The reversal of 1626105744421 is 1244475016261.

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

It can be written as a sum of positive squares in 2 ways, for example, as 344933036100 + 1281172708321 = 587310^2 + 1131889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1626105744421 - 2⁹ = 1626105743909 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 (1626105744521) 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, 15300120 + ... + 15406033.

It is an arithmetic number, because the mean of its divisors is an integer number (406534125883).

Almost surely, 2^{1626105744421} is an apocalyptic number.

It is an amenable number.

1626105744421 is a deficient number, since it is larger than the sum of its proper divisors (30759111).

1626105744421 is an equidigital number, since it uses as much as digits as its factorization.

1626105744421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30759110.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 1626105744421 in words is "one trillion, six hundred twenty-six billion, one hundred five million, seven hundred forty-four thousand, four hundred twenty-one".