123855863040 has 432 divisors, whose sum is σ = 527424014208. Its totient is φ = 26132004864.

The previous prime is 123855863003. The next prime is 123855863077. The reversal of 123855863040 is 40368558321.

123855863040 is a `hidden beast` number, since 1 + 2 + 3 + 8 + 5 + 5 + 8 + 630 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (123855863003) and next prime (123855863077).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 989247 + ... + 1107393.

Almost surely, 2^123855863040 is an apocalyptic number.

123855863040 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 123855863040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263712007104).

123855863040 is an abundant number, since it is smaller than the sum of its proper divisors (403568151168).

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

123855863040 is a wasteful number, since it uses less digits than its factorization.

123855863040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118194 (or 118177 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 123855863040 in words is "one hundred twenty-three billion, eight hundred fifty-five million, eight hundred sixty-three thousand, forty".