155420064 has 36 divisors (see below), whose sum is σ = 441976626. Its totient is φ = 51806592.

The previous prime is 155420059. The next prime is 155420071. The reversal of 155420064 is 460024551.

It can be written as a sum of positive squares in only one way, i.e., 131331600 + 24088464 = 11460^2 + 4908^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 269539 + ... + 270114.

Almost surely, 2^155420064 is an apocalyptic number.

It is an amenable number.

155420064 is an abundant number, since it is smaller than the sum of its proper divisors (286556562).

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

155420064 is a wasteful number, since it uses less digits than its factorization.

155420064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539669 (or 539658 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 155420064 is about 12466.7583597341. The cubic root of 155420064 is about 537.6533562051.

The spelling of 155420064 in words is "one hundred fifty-five million, four hundred twenty thousand, sixty-four".