155391012326400 has 264 divisors, whose sum is σ = 513618700961424. Its totient is φ = 41434108723200.

The previous prime is 155391012326393. The next prime is 155391012326441. The reversal of 155391012326400 is 4623210193551.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 984573894 + ... + 984731706.

Almost surely, 2^{155391012326400} is an apocalyptic number.

155391012326400 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 155391012326400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256809350480712).

155391012326400 is an abundant number, since it is smaller than the sum of its proper divisors (358227688635024).

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

155391012326400 is a wasteful number, since it uses less digits than its factorization.

155391012326400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170667 (or 170644 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 155391012326400 in words is "one hundred fifty-five trillion, three hundred ninety-one billion, twelve million, three hundred twenty-six thousand, four hundred".