4378309749431 has 4 divisors (see below), whose sum is σ = 4380134808000. Its totient is φ = 4376484690864.

The previous prime is 4378309749413. The next prime is 4378309749433. The reversal of 4378309749431 is 1349479038734.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4378309749431 is a prime.

It is a super-2 number, since 2×4378309749431² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4378309749433) 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, 912525686 + ... + 912530483.

It is an arithmetic number, because the mean of its divisors is an integer number (1095033702000).

Almost surely, 2^{4378309749431} is an apocalyptic number.

4378309749431 is a deficient number, since it is larger than the sum of its proper divisors (1825058569).

4378309749431 is a wasteful number, since it uses less digits than its factorization.

4378309749431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825058568.

The product of its (nonzero) digits is 54867456, while the sum is 62.

The spelling of 4378309749431 in words is "four trillion, three hundred seventy-eight billion, three hundred nine million, seven hundred forty-nine thousand, four hundred thirty-one".