1861225076969 has 8 divisors (see below), whose sum is σ = 1970731163808. Its totient is φ = 1751721463360.

The previous prime is 1861225076951. The next prime is 1861225077011. The reversal of 1861225076969 is 9696705221681.

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 1861225076969 - 2¹² = 1861225072873 is a prime.

It is a super-2 number, since 2×1861225076969² (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 (1861225076939) 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, 1061474 + ... + 2202084.

It is an arithmetic number, because the mean of its divisors is an integer number (246341395476).

Almost surely, 2^{1861225076969} is an apocalyptic number.

It is an amenable number.

1861225076969 is a deficient number, since it is larger than the sum of its proper divisors (109506086839).

1861225076969 is a wasteful number, since it uses less digits than its factorization.

1861225076969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236615.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 1861225076969 in words is "one trillion, eight hundred sixty-one billion, two hundred twenty-five million, seventy-six thousand, nine hundred sixty-nine".