1620611228416 has 18 divisors (see below), whose sum is σ = 3234891944732. Its totient is φ = 810305614080.

The previous prime is 1620611228413. The next prime is 1620611228419. The reversal of 1620611228416 is 6148221160261.

It is an interprime number because it is at equal distance from previous prime (1620611228413) and next prime (1620611228419).

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 as a sum of consecutive naturals, namely, 3165256050 + ... + 3165256561.

Almost surely, 2^{1620611228416} is an apocalyptic number.

1620611228416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1620611228416 is a deficient number, since it is larger than the sum of its proper divisors (1614280716316).

1620611228416 is an frugal number, since it uses more digits than its factorization.

1620611228416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6330512627 (or 6330512613 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

Adding to 1620611228416 its reverse (6148221160261), we get a palindrome (7768832388677).

The spelling of 1620611228416 in words is "one trillion, six hundred twenty billion, six hundred eleven million, two hundred twenty-eight thousand, four hundred sixteen".