155799450 has 72 divisors (see below), whose sum is σ = 434118048. Its totient is φ = 41543280.

The previous prime is 155799433. The next prime is 155799461. The reversal of 155799450 is 54997551.

155799450 is a `hidden beast` number, since 1 + 557 + 9 + 94 + 5 + 0 = 666.

155799450 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 (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155799396 and 155799405.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5739 + ... + 18561.

Almost surely, 2^155799450 is an apocalyptic number.

155799450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155799450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217059024).

155799450 is an abundant number, since it is smaller than the sum of its proper divisors (278318598).

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

155799450 is a wasteful number, since it uses less digits than its factorization.

155799450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12850 (or 12833 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 45.

The square root of 155799450 is about 12481.9649895359. The cubic root of 155799450 is about 538.0904778203.

The spelling of 155799450 in words is "one hundred fifty-five million, seven hundred ninety-nine thousand, four hundred fifty".