247561457852 has 6 divisors (see below), whose sum is σ = 433232551248. Its totient is φ = 123780728924.

The previous prime is 247561457821. The next prime is 247561457863. The reversal of 247561457852 is 258754165742.

It is a super-2 number, since 2×247561457852² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30945182228 + ... + 30945182235.

It is an arithmetic number, because the mean of its divisors is an integer number (72205425208).

Almost surely, 2^247561457852 is an apocalyptic number.

It is an amenable number.

247561457852 is a deficient number, since it is larger than the sum of its proper divisors (185671093396).

247561457852 is a wasteful number, since it uses less digits than its factorization.

247561457852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61890364467 (or 61890364465 counting only the distinct ones).

The product of its digits is 18816000, while the sum is 56.

The spelling of 247561457852 in words is "two hundred forty-seven billion, five hundred sixty-one million, four hundred fifty-seven thousand, eight hundred fifty-two".