1865961992098 has 16 divisors (see below), whose sum is σ = 2802872272320. Its totient is φ = 931671876816.

The previous prime is 1865961992047. The next prime is 1865961992099. The reversal of 1865961992098 is 8902991695681.

It is a super-2 number, since 2×1865961992098² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1865961992098.

It is not an unprimeable number, because it can be changed into a prime (1865961992099) 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, 5728636 + ... + 6045592.

It is an arithmetic number, because the mean of its divisors is an integer number (175179517020).

Almost surely, 2^{1865961992098} is an apocalyptic number.

1865961992098 is a deficient number, since it is larger than the sum of its proper divisors (936910280222).

1865961992098 is a wasteful number, since it uses less digits than its factorization.

1865961992098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321081.

The product of its (nonzero) digits is 151165440, while the sum is 73.

The spelling of 1865961992098 in words is "one trillion, eight hundred sixty-five billion, nine hundred sixty-one million, nine hundred ninety-two thousand, ninety-eight".