40063646651 has 4 divisors (see below), whose sum is σ = 45787024752. Its totient is φ = 34340268552.

The previous prime is 40063646647. The next prime is 40063646743. The reversal of 40063646651 is 15664636004.

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 40063646651 - 2² = 40063646647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40063646599 and 40063646608.

It is not an unprimeable number, because it can be changed into a prime (40063646641) 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, 2861689040 + ... + 2861689053.

It is an arithmetic number, because the mean of its divisors is an integer number (11446756188).

Almost surely, 2^40063646651 is an apocalyptic number.

40063646651 is a deficient number, since it is larger than the sum of its proper divisors (5723378101).

40063646651 is an equidigital number, since it uses as much as digits as its factorization.

40063646651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723378100.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 40063646651 in words is "forty billion, sixty-three million, six hundred forty-six thousand, six hundred fifty-one".