1616537226421 has 8 divisors (see below), whose sum is σ = 1741183051104. Its totient is φ = 1491933802800.

The previous prime is 1616537226413. The next prime is 1616537226439. The reversal of 1616537226421 is 1246227356161.

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

It is a cyclic number.

It is not a de Polignac number, because 1616537226421 - 2³ = 1616537226413 is a prime.

It is a super-2 number, since 2×1616537226421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616537206421) 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 7 ways as a sum of consecutive naturals, for example, 10521055 + ... + 10673596.

It is an arithmetic number, because the mean of its divisors is an integer number (217647881388).

Almost surely, 2^{1616537226421} is an apocalyptic number.

It is an amenable number.

1616537226421 is a deficient number, since it is larger than the sum of its proper divisors (124645824683).

1616537226421 is a wasteful number, since it uses less digits than its factorization.

1616537226421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21200531.

The product of its digits is 725760, while the sum is 46.

The spelling of 1616537226421 in words is "one trillion, six hundred sixteen billion, five hundred thirty-seven million, two hundred twenty-six thousand, four hundred twenty-one".