247797797742 has 96 divisors (see below), whose sum is σ = 591843339360. Its totient is φ = 74304000000.

The previous prime is 247797797671. The next prime is 247797797809.

It is a happy number.

247797797742 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×247797797742² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60011934 + ... + 60016062.

It is an arithmetic number, because the mean of its divisors is an integer number (6165034785).

Almost surely, 2^247797797742 is an apocalyptic number.

247797797742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 247797797742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295921669680).

247797797742 is an abundant number, since it is smaller than the sum of its proper divisors (344045541618).

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

247797797742 is a wasteful number, since it uses less digits than its factorization.

247797797742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7250 (or 7247 counting only the distinct ones).

The product of its digits is 609892416, while the sum is 72.

The spelling of 247797797742 in words is "two hundred forty-seven billion, seven hundred ninety-seven million, seven hundred ninety-seven thousand, seven hundred forty-two".