247640257511071 has 8 divisors (see below), whose sum is σ = 247811677516800. Its totient is φ = 247468841681880.

The previous prime is 247640257511039. The next prime is 247640257511089. The reversal of 247640257511071 is 170115752046742.

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

It is a cyclic number.

It is not a de Polignac number, because 247640257511071 - 2⁵ = 247640257511039 is a prime.

It is a super-2 number, since 2×247640257511071² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247640257511771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122649420 + ... + 124652158.

It is an arithmetic number, because the mean of its divisors is an integer number (30976459689600).

Almost surely, 2^{247640257511071} is an apocalyptic number.

247640257511071 is a deficient number, since it is larger than the sum of its proper divisors (171420005729).

247640257511071 is a wasteful number, since it uses less digits than its factorization.

247640257511071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088269.

The product of its (nonzero) digits is 3292800, while the sum is 52.

The spelling of 247640257511071 in words is "two hundred forty-seven trillion, six hundred forty billion, two hundred fifty-seven million, five hundred eleven thousand, seventy-one".