10144587861 has 12 divisors (see below), whose sum is σ = 14854024588. Its totient is φ = 6670413504.

The previous prime is 10144587857. The next prime is 10144587877. The reversal of 10144587861 is 16878544101.

10144587861 is a `hidden beast` number, since 1 + 0 + 1 + 4 + 4 + 587 + 8 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4044196836 + 6100391025 = 63594^2 + 78105^2 .

It is not a de Polignac number, because 10144587861 - 2² = 10144587857 is a prime.

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 (10144587881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7719730 + ... + 7721043.

Almost surely, 2^10144587861 is an apocalyptic number.

It is an amenable number.

10144587861 is a deficient number, since it is larger than the sum of its proper divisors (4709436727).

10144587861 is a wasteful number, since it uses less digits than its factorization.

10144587861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15440852 (or 15440849 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 10144587861 in words is "ten billion, one hundred forty-four million, five hundred eighty-seven thousand, eight hundred sixty-one".