155630664 has 144 divisors (see below), whose sum is σ = 506488320. Its totient is φ = 43001280.

The previous prime is 155630647. The next prime is 155630669. The reversal of 155630664 is 466036551.

155630664 is a `hidden beast` number, since 15 + 5 + 630 + 6 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155630669) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 108657 + ... + 110079.

It is an arithmetic number, because the mean of its divisors is an integer number (3517280).

Almost surely, 2^155630664 is an apocalyptic number.

155630664 is a gapful number since it is divisible by the number (14) 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 155630664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253244160).

155630664 is an abundant number, since it is smaller than the sum of its proper divisors (350857656).

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

155630664 is a wasteful number, since it uses less digits than its factorization.

155630664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480 (or 1466 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 155630664 is about 12475.2019622930. The cubic root of 155630664 is about 537.8960934014.

The spelling of 155630664 in words is "one hundred fifty-five million, six hundred thirty thousand, six hundred sixty-four".