40245943739 has 4 divisors (see below), whose sum is σ = 40246658424. Its totient is φ = 40245229056.

The previous prime is 40245943729. The next prime is 40245943757. The reversal of 40245943739 is 93734954204.

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 40245943739 - 2⁴ = 40245943723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40245943729) 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, 264902 + ... + 388155.

It is an arithmetic number, because the mean of its divisors is an integer number (10061664606).

Almost surely, 2^40245943739 is an apocalyptic number.

40245943739 is a deficient number, since it is larger than the sum of its proper divisors (714685).

40245943739 is an equidigital number, since it uses as much as digits as its factorization.

40245943739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714684.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 40245943739 in words is "forty billion, two hundred forty-five million, nine hundred forty-three thousand, seven hundred thirty-nine".