1865212084925 has 12 divisors (see below), whose sum is σ = 2643271983456. Its totient is φ = 1279002572400.

The previous prime is 1865212084903. The next prime is 1865212084951. The reversal of 1865212084925 is 5294802125681.

It is not a de Polignac number, because 1865212084925 - 2⁴⁰ = 765700457149 is a prime.

It is a super-2 number, since 2×1865212084925² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5329177211 + ... + 5329177560.

It is an arithmetic number, because the mean of its divisors is an integer number (220272665288).

Almost surely, 2^{1865212084925} is an apocalyptic number.

It is an amenable number.

1865212084925 is a deficient number, since it is larger than the sum of its proper divisors (778059898531).

1865212084925 is a wasteful number, since it uses less digits than its factorization.

1865212084925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10658354788 (or 10658354783 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 53.

The spelling of 1865212084925 in words is "one trillion, eight hundred sixty-five billion, two hundred twelve million, eighty-four thousand, nine hundred twenty-five".