40199254649 has 4 divisors (see below), whose sum is σ = 40199843664. Its totient is φ = 40198665636.

The previous prime is 40199254639. The next prime is 40199254657. The reversal of 40199254649 is 94645299104.

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 40199254649 - 2⁸ = 40199254393 is a prime.

It is a super-2 number, since 2×40199254649² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40199254649.

It is not an unprimeable number, because it can be changed into a prime (40199254639) 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, 176327 + ... + 333900.

It is an arithmetic number, because the mean of its divisors is an integer number (10049960916).

Almost surely, 2^40199254649 is an apocalyptic number.

It is an amenable number.

40199254649 is a deficient number, since it is larger than the sum of its proper divisors (589015).

40199254649 is an equidigital number, since it uses as much as digits as its factorization.

40199254649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589014.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 40199254649 in words is "forty billion, one hundred ninety-nine million, two hundred fifty-four thousand, six hundred forty-nine".