1621726535106 has 48 divisors (see below), whose sum is σ = 3547596019968. Its totient is φ = 535369917600.

The previous prime is 1621726535081. The next prime is 1621726535141. The reversal of 1621726535106 is 6015356271261.

1621726535106 is a `hidden beast` number, since 1 + 6 + 2 + 1 + 7 + 2 + 6 + 535 + 106 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6701071 + ... + 6938861.

It is an arithmetic number, because the mean of its divisors is an integer number (73908250416).

Almost surely, 2^{1621726535106} is an apocalyptic number.

1621726535106 is an abundant number, since it is smaller than the sum of its proper divisors (1925869484862).

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

1621726535106 is a wasteful number, since it uses less digits than its factorization.

1621726535106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241447 (or 241444 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 1621726535106 in words is "one trillion, six hundred twenty-one billion, seven hundred twenty-six million, five hundred thirty-five thousand, one hundred six".