101866453812 has 36 divisors (see below), whose sum is σ = 259135872996. Its totient is φ = 33739205760.

The previous prime is 101866453807. The next prime is 101866453823. The reversal of 101866453812 is 218354668101.

101866453812 is a `hidden beast` number, since 1 + 0 + 186 + 6 + 453 + 8 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 65795328036 + 36071125776 = 256506^2 + 189924^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9005889 + ... + 9017192.

Almost surely, 2^101866453812 is an apocalyptic number.

101866453812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101866453812 is an abundant number, since it is smaller than the sum of its proper divisors (157269419184).

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

101866453812 is a wasteful number, since it uses less digits than its factorization.

101866453812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18023248 (or 18023243 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 101866453812 in words is "one hundred one billion, eight hundred sixty-six million, four hundred fifty-three thousand, eight hundred twelve".