155687136 has 96 divisors (see below), whose sum is σ = 448156800. Its totient is φ = 46932480.

The previous prime is 155687131. The next prime is 155687143. The reversal of 155687136 is 631786551.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155687131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400030 + ... + 400418.

It is an arithmetic number, because the mean of its divisors is an integer number (4668300).

Almost surely, 2^155687136 is an apocalyptic number.

155687136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155687136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224078400).

155687136 is an abundant number, since it is smaller than the sum of its proper divisors (292469664).

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

155687136 is a wasteful number, since it uses less digits than its factorization.

155687136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792 (or 784 counting only the distinct ones).

The product of its digits is 151200, while the sum is 42.

The square root of 155687136 is about 12477.4651271803. The cubic root of 155687136 is about 537.9611456948.

The spelling of 155687136 in words is "one hundred fifty-five million, six hundred eighty-seven thousand, one hundred thirty-six".