1861018367 has 12 divisors (see below), whose sum is σ = 2033693640. Its totient is φ = 1702086048.

The previous prime is 1861018361. The next prime is 1861018387. The reversal of 1861018367 is 7638101681.

It is not a de Polignac number, because 1861018367 - 2¹⁰ = 1861017343 is a prime.

It is a super-2 number, since 2×1861018367² = 6926778724622693378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861018361) 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, 32093 + ... + 68934.

It is an arithmetic number, because the mean of its divisors is an integer number (169474470).

Almost surely, 2^1861018367 is an apocalyptic number.

1861018367 is a deficient number, since it is larger than the sum of its proper divisors (172675273).

1861018367 is a wasteful number, since it uses less digits than its factorization.

1861018367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101162 (or 101149 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1861018367 is about 43139.5220998101. The cubic root of 1861018367 is about 1230.0333493943.

The spelling of 1861018367 in words is "one billion, eight hundred sixty-one million, eighteen thousand, three hundred sixty-seven".