1917201381377 has 4 divisors (see below), whose sum is σ = 2000557963200. Its totient is φ = 1833844799556.

The previous prime is 1917201381371. The next prime is 1917201381383. The reversal of 1917201381377 is 7731831027191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1917201381371) and next prime (1917201381383).

It is a cyclic number.

It is not a de Polignac number, because 1917201381377 - 2²⁶ = 1917134272513 is a prime.

It is a super-2 number, since 2×1917201381377² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1917201381371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41678290877 + ... + 41678290922.

It is an arithmetic number, because the mean of its divisors is an integer number (500139490800).

Almost surely, 2^{1917201381377} is an apocalyptic number.

It is an amenable number.

1917201381377 is a deficient number, since it is larger than the sum of its proper divisors (83356581823).

1917201381377 is an equidigital number, since it uses as much as digits as its factorization.

1917201381377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83356581822.

The product of its (nonzero) digits is 444528, while the sum is 50.

The spelling of 1917201381377 in words is "one trillion, nine hundred seventeen billion, two hundred one million, three hundred eighty-one thousand, three hundred seventy-seven".