4278342153991 has 8 divisors (see below), whose sum is σ = 4337170535360. Its totient is φ = 4219519744512.

The previous prime is 4278342153961. The next prime is 4278342154001. The reversal of 4278342153991 is 1993512438724.

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

It is a cyclic number.

It is not a de Polignac number, because 4278342153991 - 2¹⁷ = 4278342022919 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 (4278342153961) 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, 40650 + ... + 2925463.

It is an arithmetic number, because the mean of its divisors is an integer number (542146316920).

Almost surely, 2^{4278342153991} is an apocalyptic number.

4278342153991 is a deficient number, since it is larger than the sum of its proper divisors (58828381369).

4278342153991 is a wasteful number, since it uses less digits than its factorization.

4278342153991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985945.

The product of its digits is 13063680, while the sum is 58.

The spelling of 4278342153991 in words is "four trillion, two hundred seventy-eight billion, three hundred forty-two million, one hundred fifty-three thousand, nine hundred ninety-one".