247488139504 has 80 divisors (see below), whose sum is σ = 507971059200. Its totient is φ = 116608359168.

The previous prime is 247488139499. The next prime is 247488139529. The reversal of 247488139504 is 405931884742.

It is a super-2 number, since 2×247488139504² (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 15 ways as a sum of consecutive naturals, for example, 30781917 + ... + 30789955.

It is an arithmetic number, because the mean of its divisors is an integer number (6349638240).

Almost surely, 2^247488139504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247488139504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253985529600).

247488139504 is an abundant number, since it is smaller than the sum of its proper divisors (260482919696).

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

247488139504 is a wasteful number, since it uses less digits than its factorization.

247488139504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9662 (or 9656 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 247488139504 in words is "two hundred forty-seven billion, four hundred eighty-eight million, one hundred thirty-nine thousand, five hundred four".