1616668971254 has 4 divisors (see below), whose sum is σ = 2425003456884. Its totient is φ = 808334485626.

The previous prime is 1616668971199. The next prime is 1616668971271. The reversal of 1616668971254 is 4521798666161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1616668971254² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 404167242812 + ... + 404167242815.

It is an arithmetic number, because the mean of its divisors is an integer number (606250864221).

Almost surely, 2^{1616668971254} is an apocalyptic number.

1616668971254 is a deficient number, since it is larger than the sum of its proper divisors (808334485630).

1616668971254 is an equidigital number, since it uses as much as digits as its factorization.

1616668971254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808334485629.

The product of its digits is 26127360, while the sum is 62.

The spelling of 1616668971254 in words is "one trillion, six hundred sixteen billion, six hundred sixty-eight million, nine hundred seventy-one thousand, two hundred fifty-four".