155064420 has 108 divisors (see below), whose sum is σ = 547187004. Its totient is φ = 35441280.

The previous prime is 155064401. The next prime is 155064431. The reversal of 155064420 is 24460551.

155064420 is a `hidden beast` number, since 15 + 5 + 0 + 644 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47444544 + 107619876 = 6888^2 + 10374^2 .

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, 30 + ... + 17610.

Almost surely, 2^155064420 is an apocalyptic number.

155064420 is a gapful number since it is divisible by the number (10) 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 155064420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273593502).

155064420 is an abundant number, since it is smaller than the sum of its proper divisors (392122584).

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

155064420 is a wasteful number, since it uses less digits than its factorization.

155064420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17610 (or 17598 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 155064420 is about 12452.4864986877. The cubic root of 155064420 is about 537.2429432453.

The spelling of 155064420 in words is "one hundred fifty-five million, sixty-four thousand, four hundred twenty".