155771064 has 96 divisors (see below), whose sum is σ = 443944800. Its totient is φ = 49271040.

The previous prime is 155771053. The next prime is 155771107. The reversal of 155771064 is 460177551.

155771064 is a `hidden beast` number, since 15 + 577 + 10 + 64 = 666.

It is a super-3 number, since 3×155771064³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 126757 + ... + 127979.

It is an arithmetic number, because the mean of its divisors is an integer number (4624425).

Almost surely, 2^155771064 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 155771064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221972400).

155771064 is an abundant number, since it is smaller than the sum of its proper divisors (288173736).

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

155771064 is a wasteful number, since it uses less digits than its factorization.

155771064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 155771064 is about 12480.8278571576. The cubic root of 155771064 is about 538.0577965667.

It can be divided in two parts, 15577 and 1064, that added together give a square (16641 = 129²).

The spelling of 155771064 in words is "one hundred fifty-five million, seven hundred seventy-one thousand, sixty-four".