100856640780 has 96 divisors (see below), whose sum is σ = 358601402880. Its totient is φ = 23052945600.

The previous prime is 100856640779. The next prime is 100856640803. The reversal of 100856640780 is 87046658001.

It is a happy number.

100856640780 is a `hidden beast` number, since 1 + 0 + 0 + 8 + 566 + 4 + 0 + 7 + 80 = 666.

100856640780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13337046 + ... + 13344605.

It is an arithmetic number, because the mean of its divisors is an integer number (3735431280).

Almost surely, 2^100856640780 is an apocalyptic number.

100856640780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100856640780 is an abundant number, since it is smaller than the sum of its proper divisors (257744762100).

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

100856640780 is a wasteful number, since it uses less digits than its factorization.

100856640780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26681676 (or 26681668 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 100856640780 in words is "one hundred billion, eight hundred fifty-six million, six hundred forty thousand, seven hundred eighty".