40646778908577 has 16 divisors (see below), whose sum is σ = 59015286984000. Its totient is φ = 24786420531264.

The previous prime is 40646778908531. The next prime is 40646778908599. The reversal of 40646778908577 is 77580987764604.

It is not a de Polignac number, because 40646778908577 - 2⁸ = 40646778908321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40646778908777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12294849802 + ... + 12294853107.

It is an arithmetic number, because the mean of its divisors is an integer number (3688455436500).

Almost surely, 2^{40646778908577} is an apocalyptic number.

It is an amenable number.

40646778908577 is a deficient number, since it is larger than the sum of its proper divisors (18368508075423).

40646778908577 is a wasteful number, since it uses less digits than its factorization.

40646778908577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24589702960.

The product of its (nonzero) digits is 3982970880, while the sum is 78.

The spelling of 40646778908577 in words is "forty trillion, six hundred forty-six billion, seven hundred seventy-eight million, nine hundred eight thousand, five hundred seventy-seven".