101866453813 has 4 divisors (see below), whose sum is σ = 102038235948. Its totient is φ = 101694671680.

The previous prime is 101866453807. The next prime is 101866453823. The reversal of 101866453813 is 318354668101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78493547889 + 23372905924 = 280167^2 + 152882^2 .

It is a cyclic number.

It is not a de Polignac number, because 101866453813 - 2²⁹ = 101329582901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101866453823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85890178 + ... + 85891363.

It is an arithmetic number, because the mean of its divisors is an integer number (25509558987).

Almost surely, 2^101866453813 is an apocalyptic number.

It is an amenable number.

101866453813 is a deficient number, since it is larger than the sum of its proper divisors (171782135).

101866453813 is an equidigital number, since it uses as much as digits as its factorization.

101866453813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171782134.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 101866453813 in words is "one hundred one billion, eight hundred sixty-six million, four hundred fifty-three thousand, eight hundred thirteen".