155449664 has 14 divisors (see below), whose sum is σ = 308470554. Its totient is φ = 77724800.

The previous prime is 155449607. The next prime is 155449681. The reversal of 155449664 is 466944551.

It can be written as a sum of positive squares in only one way, i.e., 88209664 + 67240000 = 9392^2 + 8200^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1214387 + ... + 1214514.

It is an arithmetic number, because the mean of its divisors is an integer number (22033611).

Almost surely, 2^155449664 is an apocalyptic number.

It is an amenable number.

155449664 is a deficient number, since it is larger than the sum of its proper divisors (153020890).

155449664 is an equidigital number, since it uses as much as digits as its factorization.

155449664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428913 (or 2428903 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The square root of 155449664 is about 12467.9454602593. The cubic root of 155449664 is about 537.6874863526.

The spelling of 155449664 in words is "one hundred fifty-five million, four hundred forty-nine thousand, six hundred sixty-four".