1902128027105 has 8 divisors (see below), whose sum is σ = 2303494492200. Its totient is φ = 1507741848576.

The previous prime is 1902128027101. The next prime is 1902128027117. The reversal of 1902128027105 is 5017208212091.

It can be written as a sum of positive squares in 4 ways, for example, as 969659692369 + 932468334736 = 984713^2 + 965644^2 .

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 1902128027105 - 2² = 1902128027101 is a prime.

It is a super-2 number, since 2×1902128027105² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1902128027101) 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, 1745071040 + ... + 1745072129.

It is an arithmetic number, because the mean of its divisors is an integer number (287936811525).

Almost surely, 2^{1902128027105} is an apocalyptic number.

It is an amenable number.

1902128027105 is a deficient number, since it is larger than the sum of its proper divisors (401366465095).

1902128027105 is a wasteful number, since it uses less digits than its factorization.

1902128027105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490143283.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 1902128027105 in words is "one trillion, nine hundred two billion, one hundred twenty-eight million, twenty-seven thousand, one hundred five".