247141356985 has 4 divisors (see below), whose sum is σ = 296569628388. Its totient is φ = 197713085584.

The previous prime is 247141356971. The next prime is 247141356989. The reversal of 247141356985 is 589653141742.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76726784016 + 170414572969 = 276996^2 + 412813^2 .

It is a cyclic number.

It is not a de Polignac number, because 247141356985 - 2¹³ = 247141348793 is a prime.

It is a super-2 number, since 2×247141356985² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247141356989) 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, 24714135694 + ... + 24714135703.

It is an arithmetic number, because the mean of its divisors is an integer number (74142407097).

Almost surely, 2^247141356985 is an apocalyptic number.

It is an amenable number.

247141356985 is a deficient number, since it is larger than the sum of its proper divisors (49428271403).

247141356985 is an equidigital number, since it uses as much as digits as its factorization.

247141356985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49428271402.

The product of its digits is 7257600, while the sum is 55.

The spelling of 247141356985 in words is "two hundred forty-seven billion, one hundred forty-one million, three hundred fifty-six thousand, nine hundred eighty-five".