1902142051217 has 4 divisors (see below), whose sum is σ = 1963501472256. Its totient is φ = 1840782630180.

The previous prime is 1902142051123. The next prime is 1902142051261. The reversal of 1902142051217 is 7121502412091.

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 a cyclic number.

It is not a de Polignac number, because 1902142051217 - 2¹⁴ = 1902142034833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1902142051297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30679710473 + ... + 30679710534.

It is an arithmetic number, because the mean of its divisors is an integer number (490875368064).

Almost surely, 2^{1902142051217} is an apocalyptic number.

It is an amenable number.

1902142051217 is a deficient number, since it is larger than the sum of its proper divisors (61359421039).

1902142051217 is an equidigital number, since it uses as much as digits as its factorization.

1902142051217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61359421038.

The product of its (nonzero) digits is 10080, while the sum is 35.

The spelling of 1902142051217 in words is "one trillion, nine hundred two billion, one hundred forty-two million, fifty-one thousand, two hundred seventeen".