40946656651 has 4 divisors (see below), whose sum is σ = 40963256872. Its totient is φ = 40930056432.

The previous prime is 40946656649. The next prime is 40946656693. The reversal of 40946656651 is 15665664904.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40946656651 - 2¹ = 40946656649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40946656351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8296410 + ... + 8301343.

It is an arithmetic number, because the mean of its divisors is an integer number (10240814218).

Almost surely, 2^40946656651 is an apocalyptic number.

40946656651 is a deficient number, since it is larger than the sum of its proper divisors (16600221).

40946656651 is a wasteful number, since it uses less digits than its factorization.

40946656651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16600220.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 40946656651 in words is "forty billion, nine hundred forty-six million, six hundred fifty-six thousand, six hundred fifty-one".