4278730722487 has 4 divisors (see below), whose sum is σ = 4607863855000. Its totient is φ = 3949597589976.

The previous prime is 4278730722463. The next prime is 4278730722493. The reversal of 4278730722487 is 7842270378724.

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-4278730722487 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 (4278730720487) 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, 164566566237 + ... + 164566566262.

It is an arithmetic number, because the mean of its divisors is an integer number (1151965963750).

Almost surely, 2^{4278730722487} is an apocalyptic number.

4278730722487 is a deficient number, since it is larger than the sum of its proper divisors (329133132513).

4278730722487 is a wasteful number, since it uses less digits than its factorization.

4278730722487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329133132512.

The product of its (nonzero) digits is 59006976, while the sum is 61.

The spelling of 4278730722487 in words is "four trillion, two hundred seventy-eight billion, seven hundred thirty million, seven hundred twenty-two thousand, four hundred eighty-seven".