123779824547520 has 448 divisors, whose sum is σ = 398404284825600. Its totient is φ = 32557837025280.

The previous prime is 123779824547461. The next prime is 123779824547521. The reversal of 123779824547520 is 25745428977321.

It is not an unprimeable number, because it can be changed into a prime (123779824547521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15056537010 + ... + 15056545230.

Almost surely, 2^{123779824547520} is an apocalyptic number.

123779824547520 is a gapful number since it is divisible by the number (10) 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 123779824547520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199202142412800).

123779824547520 is an abundant number, since it is smaller than the sum of its proper divisors (274624460278080).

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

123779824547520 is a wasteful number, since it uses less digits than its factorization.

123779824547520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9096 (or 9086 counting only the distinct ones).

The product of its (nonzero) digits is 237081600, while the sum is 66.

The spelling of 123779824547520 in words is "one hundred twenty-three trillion, seven hundred seventy-nine billion, eight hundred twenty-four million, five hundred forty-seven thousand, five hundred twenty".