155616625 has 16 divisors (see below), whose sum is σ = 194882688. Its totient is φ = 124062000.

The previous prime is 155616611. The next prime is 155616647. The reversal of 155616625 is 526616551.

It is not a de Polignac number, because 155616625 - 2¹¹ = 155614577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36874 + ... + 40876.

It is an arithmetic number, because the mean of its divisors is an integer number (12180168).

Almost surely, 2^155616625 is an apocalyptic number.

It is an amenable number.

155616625 is a deficient number, since it is larger than the sum of its proper divisors (39266063).

155616625 is an equidigital number, since it uses as much as digits as its factorization.

155616625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329 (or 4319 counting only the distinct ones).

The product of its digits is 54000, while the sum is 37.

The square root of 155616625 is about 12474.6392733417. The cubic root of 155616625 is about 537.8799188890.

It can be divided in two parts, 1556 and 16625, that added together give a palindrome (18181).

The spelling of 155616625 in words is "one hundred fifty-five million, six hundred sixteen thousand, six hundred twenty-five".