155394816 has 144 divisors (see below), whose sum is σ = 437971968. Its totient is φ = 48844800.

The previous prime is 155394809. The next prime is 155394821. The reversal of 155394816 is 618493551.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1452235 + ... + 1452341.

It is an arithmetic number, because the mean of its divisors is an integer number (3041472).

Almost surely, 2^155394816 is an apocalyptic number.

155394816 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 155394816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218985984).

155394816 is an abundant number, since it is smaller than the sum of its proper divisors (282577152).

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

155394816 is a wasteful number, since it uses less digits than its factorization.

155394816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 204 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 155394816 is about 12465.7457057330. The cubic root of 155394816 is about 537.6242406870.

It can be divided in two parts, 1553 and 94816, that added together give a palindrome (96369).

The spelling of 155394816 in words is "one hundred fifty-five million, three hundred ninety-four thousand, eight hundred sixteen".