155204600128 has 56 divisors (see below), whose sum is σ = 311283819392. Its totient is φ = 76771528704.

The previous prime is 155204600113. The next prime is 155204600129. The reversal of 155204600128 is 821006402551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 155204600093 and 155204600102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155204600129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29690251 + ... + 29695477.

It is an arithmetic number, because the mean of its divisors is an integer number (5558639632).

Almost surely, 2^155204600128 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 155204600128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155641909696).

155204600128 is an abundant number, since it is smaller than the sum of its proper divisors (156079219264).

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

155204600128 is an equidigital number, since it uses as much as digits as its factorization.

155204600128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10119 (or 10109 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 155204600128 in words is "one hundred fifty-five billion, two hundred four million, six hundred thousand, one hundred twenty-eight".