247135978320 has 320 divisors, whose sum is σ = 955754256384. Its totient is φ = 51321231360.

The previous prime is 247135978301. The next prime is 247135978339. The reversal of 247135978320 is 23879531742.

It is an interprime number because it is at equal distance from previous prime (247135978301) and next prime (247135978339).

It is a super-2 number, since 2×247135978320² (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 63 ways as a sum of consecutive naturals, for example, 40893219 + ... + 40899261.

Almost surely, 2^247135978320 is an apocalyptic number.

247135978320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247135978320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477877128192).

247135978320 is an abundant number, since it is smaller than the sum of its proper divisors (708618278064).

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

247135978320 is a wasteful number, since it uses less digits than its factorization.

247135978320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8290 (or 8284 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 247135978320 in words is "two hundred forty-seven billion, one hundred thirty-five million, nine hundred seventy-eight thousand, three hundred twenty".