110001009978 has 24 divisors (see below), whose sum is σ = 239667012000. Its totient is φ = 36462158664.

The previous prime is 110001009977. The next prime is 110001010019. The reversal of 110001009978 is 879900100011.

It is not an unprimeable number, because it can be changed into a prime (110001009977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17067078 + ... + 17073521.

It is an arithmetic number, because the mean of its divisors is an integer number (9986125500).

Almost surely, 2^110001009978 is an apocalyptic number.

110001009978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

110001009978 is an abundant number, since it is smaller than the sum of its proper divisors (129666002022).

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

110001009978 is a wasteful number, since it uses less digits than its factorization.

110001009978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34140786 (or 34140783 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

Adding to 110001009978 its reverse (879900100011), we get a palindrome (989901109989).

The spelling of 110001009978 in words is "one hundred ten billion, one million, nine thousand, nine hundred seventy-eight".