4278257251387 has 32 divisors (see below), whose sum is σ = 5002840120320. Its totient is φ = 3583077379200.

The previous prime is 4278257251351. The next prime is 4278257251421. The reversal of 4278257251387 is 7831527528724.

It is a cyclic number.

It is not a de Polignac number, because 4278257251387 - 2⁷ = 4278257251259 is a prime.

It is a super-2 number, since 2×4278257251387² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4278257251687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53888173 + ... + 53967505.

It is an arithmetic number, because the mean of its divisors is an integer number (156338753760).

Almost surely, 2^{4278257251387} is an apocalyptic number.

4278257251387 is a deficient number, since it is larger than the sum of its proper divisors (724582868933).

4278257251387 is a wasteful number, since it uses less digits than its factorization.

4278257251387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80443.

The product of its digits is 52684800, while the sum is 61.

The spelling of 4278257251387 in words is "four trillion, two hundred seventy-eight billion, two hundred fifty-seven million, two hundred fifty-one thousand, three hundred eighty-seven".