2101766501898 has 64 divisors (see below), whose sum is σ = 5521882464000. Its totient is φ = 579797652672.

The previous prime is 2101766501873. The next prime is 2101766501899. The reversal of 2101766501898 is 8981056671012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2101766501899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95855053 + ... + 95876976.

It is an arithmetic number, because the mean of its divisors is an integer number (86279413500).

Almost surely, 2^{2101766501898} is an apocalyptic number.

2101766501898 is an abundant number, since it is smaller than the sum of its proper divisors (3420115962102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101766501898 is a wasteful number, since it uses less digits than its factorization.

2101766501898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191732076 (or 191732070 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 2101766501898 in words is "two trillion, one hundred one billion, seven hundred sixty-six million, five hundred one thousand, eight hundred ninety-eight".