7861909228146 has 12 divisors (see below), whose sum is σ = 17034136661022. Its totient is φ = 2620636409376.

The previous prime is 7861909228139. The next prime is 7861909228169. The reversal of 7861909228146 is 6418229091687.

7861909228146 is a `hidden beast` number, since 7 + 8 + 619 + 0 + 9 + 2 + 2 + 8 + 1 + 4 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7779698002521 + 82211225625 = 2789211^2 + 286725^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218386367431 + ... + 218386367466.

Almost surely, 2^{7861909228146} is an apocalyptic number.

7861909228146 is an abundant number, since it is smaller than the sum of its proper divisors (9172227432876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7861909228146 is a wasteful number, since it uses less digits than its factorization.

7861909228146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436772734905 (or 436772734902 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 7861909228146 in words is "seven trillion, eight hundred sixty-one billion, nine hundred nine million, two hundred twenty-eight thousand, one hundred forty-six".