155550378 has 16 divisors (see below), whose sum is σ = 327474720. Its totient is φ = 49121136.

The previous prime is 155550361. The next prime is 155550379. The reversal of 155550378 is 873055551.

It is not an unprimeable number, because it can be changed into a prime (155550379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682125 + ... + 682352.

It is an arithmetic number, because the mean of its divisors is an integer number (20467170).

Almost surely, 2^155550378 is an apocalyptic number.

155550378 is an abundant number, since it is smaller than the sum of its proper divisors (171924342).

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

155550378 is a wasteful number, since it uses less digits than its factorization.

155550378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364501.

The product of its (nonzero) digits is 105000, while the sum is 39.

The square root of 155550378 is about 12471.9837235301. The cubic root of 155550378 is about 537.8035817398.

The spelling of 155550378 in words is "one hundred fifty-five million, five hundred fifty thousand, three hundred seventy-eight".