6861950145 has 12 divisors (see below), whose sum is σ = 11894046996. Its totient is φ = 3659706720.

The previous prime is 6861950089. The next prime is 6861950209. The reversal of 6861950145 is 5410591686.

It can be written as a sum of positive squares in 2 ways, for example, as 4822885809 + 2039064336 = 69447^2 + 45156^2 .

It is not a de Polignac number, because 6861950145 - 2⁸ = 6861949889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 152487781 = 6861950145 / (6 + 8 + 6 + 1 + 9 + 5 + 0 + 1 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 6861950145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76243846 + ... + 76243935.

It is an arithmetic number, because the mean of its divisors is an integer number (991170583).

Almost surely, 2^6861950145 is an apocalyptic number.

It is an amenable number.

6861950145 is a deficient number, since it is larger than the sum of its proper divisors (5032096851).

6861950145 is a wasteful number, since it uses less digits than its factorization.

6861950145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152487792 (or 152487789 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 6861950145 is about 82836.8887935804. Note that the first 3 decimals coincide. The cubic root of 6861950145 is about 1900.2723658482.

The spelling of 6861950145 in words is "six billion, eight hundred sixty-one million, nine hundred fifty thousand, one hundred forty-five".