109858661640 has 256 divisors, whose sum is σ = 450702604800. Its totient is φ = 23178949632.

The previous prime is 109858661609. The next prime is 109858661683. The reversal of 109858661640 is 46166858901.

109858661640 is a `hidden beast` number, since 1 + 0 + 9 + 8 + 586 + 6 + 16 + 40 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 460627 + ... + 657186.

It is an arithmetic number, because the mean of its divisors is an integer number (1760557050).

Almost surely, 2^109858661640 is an apocalyptic number.

109858661640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109858661640 is an abundant number, since it is smaller than the sum of its proper divisors (340843943160).

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

109858661640 is a wasteful number, since it uses less digits than its factorization.

109858661640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117853 (or 1117843 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 109858661640 in words is "one hundred nine billion, eight hundred fifty-eight million, six hundred sixty-one thousand, six hundred forty".