1616665054 has 4 divisors (see below), whose sum is σ = 2424997584. Its totient is φ = 808332526.

The previous prime is 1616665051. The next prime is 1616665067. The reversal of 1616665054 is 4505666161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4505666161 = 5023 ⋅897007.

It is a super-2 number, since 2×1616665054² = 5227211793649645832, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1616664998 and 1616665016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616665051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404166262 + ... + 404166265.

It is an arithmetic number, because the mean of its divisors is an integer number (606249396).

Almost surely, 2^1616665054 is an apocalyptic number.

1616665054 is a deficient number, since it is larger than the sum of its proper divisors (808332530).

1616665054 is an equidigital number, since it uses as much as digits as its factorization.

1616665054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808332529.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 1616665054 is about 40207.7735518892. The cubic root of 1616665054 is about 1173.6538206582.

The spelling of 1616665054 in words is "one billion, six hundred sixteen million, six hundred sixty-five thousand, fifty-four".