4278319197591 has 8 divisors (see below), whose sum is σ = 5704443842944. Its totient is φ = 2852203675320.

The previous prime is 4278319197587. The next prime is 4278319197613. The reversal of 4278319197591 is 1957919138724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4278319197591 - 2² = 4278319197587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278319197391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1099075 + ... + 3124836.

It is an arithmetic number, because the mean of its divisors is an integer number (713055480368).

Almost surely, 2^{4278319197591} is an apocalyptic number.

4278319197591 is a deficient number, since it is larger than the sum of its proper divisors (1426124645353).

4278319197591 is a wasteful number, since it uses less digits than its factorization.

4278319197591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4561541.

The product of its digits is 34292160, while the sum is 66.

The spelling of 4278319197591 in words is "four trillion, two hundred seventy-eight billion, three hundred nineteen million, one hundred ninety-seven thousand, five hundred ninety-one".