40794487778 has 16 divisors (see below), whose sum is σ = 66774681504. Its totient is φ = 18537375360.

The previous prime is 40794487729. The next prime is 40794487793. The reversal of 40794487778 is 87778449704.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203375 + ... + 350642.

It is an arithmetic number, because the mean of its divisors is an integer number (4173417594).

Almost surely, 2^40794487778 is an apocalyptic number.

40794487778 is a deficient number, since it is larger than the sum of its proper divisors (25980193726).

40794487778 is a wasteful number, since it uses less digits than its factorization.

40794487778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557377.

The product of its (nonzero) digits is 88510464, while the sum is 65.

The spelling of 40794487778 in words is "forty billion, seven hundred ninety-four million, four hundred eighty-seven thousand, seven hundred seventy-eight".