1671221418377 has 8 divisors (see below), whose sum is σ = 1993009393536. Its totient is φ = 1370193957792.

The previous prime is 1671221418367. The next prime is 1671221418401. The reversal of 1671221418377 is 7738141221761.

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 1671221418377 - 2⁸ = 1671221418121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1671221418367) 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, 5190128468 + ... + 5190128789.

It is an arithmetic number, because the mean of its divisors is an integer number (249126174192).

Almost surely, 2^{1671221418377} is an apocalyptic number.

It is an amenable number.

1671221418377 is a deficient number, since it is larger than the sum of its proper divisors (321787975159).

1671221418377 is a wasteful number, since it uses less digits than its factorization.

1671221418377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10380257287.

The product of its digits is 790272, while the sum is 50.

The spelling of 1671221418377 in words is "one trillion, six hundred seventy-one billion, two hundred twenty-one million, four hundred eighteen thousand, three hundred seventy-seven".