1861725794 has 16 divisors (see below), whose sum is σ = 2971728000. Its totient is φ = 871700544.

The previous prime is 1861725787. The next prime is 1861725799. The reversal of 1861725794 is 4975271681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1861725799) 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, 130814 + ... + 144345.

It is an arithmetic number, because the mean of its divisors is an integer number (185733000).

Almost surely, 2^1861725794 is an apocalyptic number.

1861725794 is a deficient number, since it is larger than the sum of its proper divisors (1110002206).

1861725794 is a wasteful number, since it uses less digits than its factorization.

1861725794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275377.

The product of its digits is 846720, while the sum is 50.

The square root of 1861725794 is about 43147.7206118701. The cubic root of 1861725794 is about 1230.1891867544.

The spelling of 1861725794 in words is "one billion, eight hundred sixty-one million, seven hundred twenty-five thousand, seven hundred ninety-four".