1911148303681 has 8 divisors (see below), whose sum is σ = 1921774157064. Its totient is φ = 1900529909760.

The previous prime is 1911148303601. The next prime is 1911148303703. The reversal of 1911148303681 is 1863038411191.

It can be written as a sum of positive squares in 4 ways, for example, as 264186748081 + 1646961555600 = 513991^2 + 1283340^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1911148303681 is a prime.

It is a super-2 number, since 2×1911148303681² (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 (1911148303601) 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, 1350640 + ... + 2376241.

It is an arithmetic number, because the mean of its divisors is an integer number (240221769633).

Almost surely, 2^{1911148303681} is an apocalyptic number.

It is an amenable number.

1911148303681 is a deficient number, since it is larger than the sum of its proper divisors (10625853383).

1911148303681 is a wasteful number, since it uses less digits than its factorization.

1911148303681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3729731.

The product of its (nonzero) digits is 124416, while the sum is 46.

The spelling of 1911148303681 in words is "one trillion, nine hundred eleven billion, one hundred forty-eight million, three hundred three thousand, six hundred eighty-one".