40064401266 has 64 divisors (see below), whose sum is σ = 82495446528. Its totient is φ = 12964468608.

The previous prime is 40064401259. The next prime is 40064401283. The reversal of 40064401266 is 66210446004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44171985 + ... + 44172891.

It is an arithmetic number, because the mean of its divisors is an integer number (1288991352).

Almost surely, 2^40064401266 is an apocalyptic number.

40064401266 is an abundant number, since it is smaller than the sum of its proper divisors (42431045262).

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

40064401266 is a wasteful number, since it uses less digits than its factorization.

40064401266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815.

The product of its (nonzero) digits is 27648, while the sum is 33.

It can be divided in two parts, 40064 and 401266, that added together give a triangular number (441330 = T₉₃₉).

The spelling of 40064401266 in words is "forty billion, sixty-four million, four hundred one thousand, two hundred sixty-six".