4278938695645 has 8 divisors (see below), whose sum is σ = 5134752610560. Its totient is φ = 3423133506000.

The previous prime is 4278938695637. The next prime is 4278938695657. The reversal of 4278938695645 is 5465968398724.

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

It is not a de Polignac number, because 4278938695645 - 2³ = 4278938695637 is a prime.

It is a super-3 number, since 3×4278938695645³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1048981 + ... + 3107770.

It is an arithmetic number, because the mean of its divisors is an integer number (641844076320).

Almost surely, 2^{4278938695645} is an apocalyptic number.

It is an amenable number.

4278938695645 is a deficient number, since it is larger than the sum of its proper divisors (855813914915).

4278938695645 is a wasteful number, since it uses less digits than its factorization.

4278938695645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362635.

The product of its digits is 3135283200, while the sum is 76.

The spelling of 4278938695645 in words is "four trillion, two hundred seventy-eight billion, nine hundred thirty-eight million, six hundred ninety-five thousand, six hundred forty-five".