247243664399172 has 48 divisors (see below), whose sum is σ = 661662760305792. Its totient is φ = 70389655338240.

The previous prime is 247243664399161. The next prime is 247243664399177. The reversal of 247243664399172 is 271993466342742.

247243664399172 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247243664399172² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247243664399097 and 247243664399106.

It is not an unprimeable number, because it can be changed into a prime (247243664399177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5237301943 + ... + 5237349150.

It is an arithmetic number, because the mean of its divisors is an integer number (13784640839704).

Almost surely, 2^{247243664399172} is an apocalyptic number.

It is an amenable number.

247243664399172 is an abundant number, since it is smaller than the sum of its proper divisors (414419095906620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247243664399172 is a wasteful number, since it uses less digits than its factorization.

247243664399172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10474651388 (or 10474651386 counting only the distinct ones).

The product of its digits is 658409472, while the sum is 69.

The spelling of 247243664399172 in words is "two hundred forty-seven trillion, two hundred forty-three billion, six hundred sixty-four million, three hundred ninety-nine thousand, one hundred seventy-two".