40163619649 has 4 divisors (see below), whose sum is σ = 40164505264. Its totient is φ = 40162734036.

The previous prime is 40163619641. The next prime is 40163619667. The reversal of 40163619649 is 94691636104.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40163619649 - 2³ = 40163619641 is a prime.

It is a super-2 number, since 2×40163619649² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40163619641) 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, 370887 + ... + 466780.

It is an arithmetic number, because the mean of its divisors is an integer number (10041126316).

Almost surely, 2^40163619649 is an apocalyptic number.

It is an amenable number.

40163619649 is a deficient number, since it is larger than the sum of its proper divisors (885615).

40163619649 is an equidigital number, since it uses as much as digits as its factorization.

40163619649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885614.

The product of its (nonzero) digits is 839808, while the sum is 49.

The spelling of 40163619649 in words is "forty billion, one hundred sixty-three million, six hundred nineteen thousand, six hundred forty-nine".