40797496866 has 64 divisors (see below), whose sum is σ = 96341999616. Its totient is φ = 11270750400.

The previous prime is 40797496843. The next prime is 40797496907. The reversal of 40797496866 is 66869479704.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40797496797 and 40797496806.

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, 1579536 + ... + 1605156.

It is an arithmetic number, because the mean of its divisors is an integer number (1505343744).

Almost surely, 2^40797496866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40797496866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48170999808).

40797496866 is an abundant number, since it is smaller than the sum of its proper divisors (55544502750).

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

40797496866 is a wasteful number, since it uses less digits than its factorization.

40797496866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26887.

The product of its (nonzero) digits is 109734912, while the sum is 66.

The spelling of 40797496866 in words is "forty billion, seven hundred ninety-seven million, four hundred ninety-six thousand, eight hundred sixty-six".