155378145 has 32 divisors (see below), whose sum is σ = 268337664. Its totient is φ = 76320000.

The previous prime is 155378141. The next prime is 155378161. The reversal of 155378145 is 541873551.

It is not a de Polignac number, because 155378145 - 2² = 155378141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (155378141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145915 + ... + 146975.

It is an arithmetic number, because the mean of its divisors is an integer number (8385552).

Almost surely, 2^155378145 is an apocalyptic number.

155378145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155378145 is a deficient number, since it is larger than the sum of its proper divisors (112959519).

155378145 is a wasteful number, since it uses less digits than its factorization.

155378145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833.

The product of its digits is 84000, while the sum is 39.

The square root of 155378145 is about 12465.0770154059. The cubic root of 155378145 is about 537.6050142750.

The spelling of 155378145 in words is "one hundred fifty-five million, three hundred seventy-eight thousand, one hundred forty-five".