1672855220551 has 2 divisors, whose sum is σ = 1672855220552. Its totient is φ = 1672855220550.

The previous prime is 1672855220537. The next prime is 1672855220579. The reversal of 1672855220551 is 1550225582761.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1672855220551 - 2³³ = 1664265285959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1672855220495 and 1672855220504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1672855220051) by changing a digit.

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, 836427610275 + 836427610276.

It is an arithmetic number, because the mean of its divisors is an integer number (836427610276).

Almost surely, 2^{1672855220551} is an apocalyptic number.

1672855220551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672855220551 is an equidigital number, since it uses as much as digits as its factorization.

1672855220551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680000, while the sum is 49.

The spelling of 1672855220551 in words is "one trillion, six hundred seventy-two billion, eight hundred fifty-five million, two hundred twenty thousand, five hundred fifty-one".