42985256387 has 16 divisors (see below), whose sum is σ = 43749411552. Its totient is φ = 42229501440.

The previous prime is 42985256383. The next prime is 42985256429. The reversal of 42985256387 is 78365258924.

It is a cyclic number.

It is not a de Polignac number, because 42985256387 - 2² = 42985256383 is a prime.

It is a super-2 number, since 2×42985256387² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42985256383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6162812 + ... + 6169782.

It is an arithmetic number, because the mean of its divisors is an integer number (2734338222).

Almost surely, 2^42985256387 is an apocalyptic number.

42985256387 is a deficient number, since it is larger than the sum of its proper divisors (764155165).

42985256387 is a wasteful number, since it uses less digits than its factorization.

42985256387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7558.

The product of its digits is 29030400, while the sum is 59.

The spelling of 42985256387 in words is "forty-two billion, nine hundred eighty-five million, two hundred fifty-six thousand, three hundred eighty-seven".