155209382478144 has 168 divisors, whose sum is σ = 446036159162880. Its totient is φ = 51602044972032.

The previous prime is 155209382478133. The next prime is 155209382478167. The reversal of 155209382478144 is 441874283902551.

155209382478144 is a `hidden beast` number, since 1 + 5 + 5 + 209 + 382 + 4 + 7 + 8 + 1 + 44 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 800723382 + ... + 800917194.

Almost surely, 2^{155209382478144} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155209382478144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223018079581440).

155209382478144 is an abundant number, since it is smaller than the sum of its proper divisors (290826776684736).

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

155209382478144 is a wasteful number, since it uses less digits than its factorization.

155209382478144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197437 (or 197424 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 63.

The spelling of 155209382478144 in words is "one hundred fifty-five trillion, two hundred nine billion, three hundred eighty-two million, four hundred seventy-eight thousand, one hundred forty-four".