155402152320 has 128 divisors (see below), whose sum is σ = 495503009280. Its totient is φ = 41427302400.

The previous prime is 155402152319. The next prime is 155402152333. The reversal of 155402152320 is 23251204551.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6960375 + ... + 6982665.

It is an arithmetic number, because the mean of its divisors is an integer number (3871117260).

Almost surely, 2^155402152320 is an apocalyptic number.

155402152320 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 155402152320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247751504640).

155402152320 is an abundant number, since it is smaller than the sum of its proper divisors (340100856960).

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

155402152320 is a wasteful number, since it uses less digits than its factorization.

155402152320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25944 (or 25932 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 155402152320 its reverse (23251204551), we get a palindrome (178653356871).

The spelling of 155402152320 in words is "one hundred fifty-five billion, four hundred two million, one hundred fifty-two thousand, three hundred twenty".