155540064 has 24 divisors (see below), whose sum is σ = 408292920. Its totient is φ = 51846656.

The previous prime is 155540059. The next prime is 155540069. The reversal of 155540064 is 460045551.

It is an interprime number because it is at equal distance from previous prime (155540059) and next prime (155540069).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155540069) 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 3 ways as a sum of consecutive naturals, for example, 810009 + ... + 810200.

It is an arithmetic number, because the mean of its divisors is an integer number (17012205).

Almost surely, 2^155540064 is an apocalyptic number.

It is an amenable number.

155540064 is an abundant number, since it is smaller than the sum of its proper divisors (252752856).

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

155540064 is a wasteful number, since it uses less digits than its factorization.

155540064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620222 (or 1620214 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 155540064 is about 12471.5702299269. The cubic root of 155540064 is about 537.7916948539.

The spelling of 155540064 in words is "one hundred fifty-five million, five hundred forty thousand, sixty-four".