108690640819 has 32 divisors (see below), whose sum is σ = 119885391360. Its totient is φ = 98113900032.

The previous prime is 108690640789. The next prime is 108690640823. The reversal of 108690640819 is 918046096801.

It is a cyclic number.

It is not a de Polignac number, because 108690640819 - 2¹³ = 108690632627 is a prime.

It is a super-2 number, since 2×108690640819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108690640879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26258052 + ... + 26262190.

It is an arithmetic number, because the mean of its divisors is an integer number (3746418480).

Almost surely, 2^108690640819 is an apocalyptic number.

108690640819 is a deficient number, since it is larger than the sum of its proper divisors (11194750541).

108690640819 is a wasteful number, since it uses less digits than its factorization.

108690640819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 108690640819 in words is "one hundred eight billion, six hundred ninety million, six hundred forty thousand, eight hundred nineteen".