155393061408 has 144 divisors (see below), whose sum is σ = 482994884736. Its totient is φ = 47099543040.

The previous prime is 155393061407. The next prime is 155393061413. The reversal of 155393061408 is 804160393551.

155393061408 is a `hidden beast` number, since 1 + 553 + 9 + 30 + 61 + 4 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (155393061407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58888 + ... + 560583.

It is an arithmetic number, because the mean of its divisors is an integer number (3354131144).

Almost surely, 2^155393061408 is an apocalyptic number.

155393061408 is a gapful number since it is divisible by the number (18) 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 155393061408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241497442368).

155393061408 is an abundant number, since it is smaller than the sum of its proper divisors (327601823328).

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

155393061408 is a wasteful number, since it uses less digits than its factorization.

155393061408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619567 (or 619556 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 155393061408 in words is "one hundred fifty-five billion, three hundred ninety-three million, sixty-one thousand, four hundred eight".