1902919142861 has 16 divisors (see below), whose sum is σ = 2219002224768. Its totient is φ = 1614353452800.

The previous prime is 1902919142821. The next prime is 1902919142867. The reversal of 1902919142861 is 1682419192091.

It is not a de Polignac number, because 1902919142861 - 2⁶ = 1902919142797 is a prime.

It is a super-2 number, since 2×1902919142861² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1902919142867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91714256 + ... + 91735001.

It is an arithmetic number, because the mean of its divisors is an integer number (138687639048).

Almost surely, 2^{1902919142861} is an apocalyptic number.

1902919142861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1902919142861 is a deficient number, since it is larger than the sum of its proper divisors (316083081907).

1902919142861 is a wasteful number, since it uses less digits than its factorization.

1902919142861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183449332.

The product of its (nonzero) digits is 559872, while the sum is 53.

The spelling of 1902919142861 in words is "one trillion, nine hundred two billion, nine hundred nineteen million, one hundred forty-two thousand, eight hundred sixty-one".