123151738320 has 480 divisors, whose sum is σ = 472233775104. Its totient is φ = 28541030400.

The previous prime is 123151738313. The next prime is 123151738321. The reversal of 123151738320 is 23837151321.

It is a happy number.

123151738320 is a `hidden beast` number, since 1 + 2 + 315 + 17 + 3 + 8 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123151738321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10730185 + ... + 10741655.

Almost surely, 2^123151738320 is an apocalyptic number.

123151738320 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 123151738320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236116887552).

123151738320 is an abundant number, since it is smaller than the sum of its proper divisors (349082036784).

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

123151738320 is a wasteful number, since it uses less digits than its factorization.

123151738320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11571 (or 11562 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

Adding to 123151738320 its reverse (23837151321), we get a palindrome (146988889641).

The spelling of 123151738320 in words is "one hundred twenty-three billion, one hundred fifty-one million, seven hundred thirty-eight thousand, three hundred twenty".