155163720 has 32 divisors (see below), whose sum is σ = 465491520. Its totient is φ = 41376960.

The previous prime is 155163719. The next prime is 155163731. The reversal of 155163720 is 27361551.

155163720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 646396 + ... + 646635.

It is an arithmetic number, because the mean of its divisors is an integer number (14546610).

Almost surely, 2^155163720 is an apocalyptic number.

155163720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155163720 is an abundant number, since it is smaller than the sum of its proper divisors (310327800).

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

155163720 is a wasteful number, since it uses less digits than its factorization.

155163720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293045 (or 1293041 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 155163720 is about 12456.4730160668. The cubic root of 155163720 is about 537.3575984762.

The spelling of 155163720 in words is "one hundred fifty-five million, one hundred sixty-three thousand, seven hundred twenty".