1620611228417 has 8 divisors (see below), whose sum is σ = 1673797995936. Its totient is φ = 1568128921632.

The previous prime is 1620611228413. The next prime is 1620611228419. The reversal of 1620611228417 is 7148221160261.

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 1620611228417 - 2² = 1620611228413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620611228413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176110508 + ... + 176119709.

It is an arithmetic number, because the mean of its divisors is an integer number (209224749492).

Almost surely, 2^{1620611228417} is an apocalyptic number.

It is an amenable number.

1620611228417 is a deficient number, since it is larger than the sum of its proper divisors (53186767519).

1620611228417 is a wasteful number, since it uses less digits than its factorization.

1620611228417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352230367.

The product of its (nonzero) digits is 64512, while the sum is 41.

Adding to 1620611228417 its reverse (7148221160261), we get a palindrome (8768832388678).

The spelling of 1620611228417 in words is "one trillion, six hundred twenty billion, six hundred eleven million, two hundred twenty-eight thousand, four hundred seventeen".