155616651 has 6 divisors (see below), whose sum is σ = 224779620. Its totient is φ = 103744428.

The previous prime is 155616647. The next prime is 155616667. The reversal of 155616651 is 156616551.

It is not a de Polignac number, because 155616651 - 2² = 155616647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155616611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8645361 + ... + 8645378.

It is an arithmetic number, because the mean of its divisors is an integer number (37463270).

Almost surely, 2^155616651 is an apocalyptic number.

155616651 is a deficient number, since it is larger than the sum of its proper divisors (69162969).

155616651 is a wasteful number, since it uses less digits than its factorization.

155616651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17290745 (or 17290742 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 155616651 is about 12474.6403154560. The cubic root of 155616651 is about 537.8799488448.

The spelling of 155616651 in words is "one hundred fifty-five million, six hundred sixteen thousand, six hundred fifty-one".