155730816 has 64 divisors (see below), whose sum is σ = 459632400. Its totient is φ = 51909120.

The previous prime is 155730803. The next prime is 155730877. The reversal of 155730816 is 618037551.

155730816 is a `hidden beast` number, since 1 + 5 + 573 + 0 + 81 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19075 + ... + 25986.

Almost surely, 2^155730816 is an apocalyptic number.

155730816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

155730816 is an abundant number, since it is smaller than the sum of its proper divisors (303901584).

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

155730816 is an equidigital number, since it uses as much as digits as its factorization.

155730816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45084 (or 45066 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 155730816 is about 12479.2153599495. The cubic root of 155730816 is about 538.0114515972.

The spelling of 155730816 in words is "one hundred fifty-five million, seven hundred thirty thousand, eight hundred sixteen".