155556140 has 48 divisors (see below), whose sum is σ = 346370304. Its totient is φ = 58579200.

The previous prime is 155556131. The next prime is 155556169. The reversal of 155556140 is 41655551.

It is a junction number, because it is equal to n+sod(n) for n = 155556097 and 155556106.

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, 19550 + ... + 26330.

It is an arithmetic number, because the mean of its divisors is an integer number (7216048).

Almost surely, 2^155556140 is an apocalyptic number.

155556140 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 155556140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173185152).

155556140 is an abundant number, since it is smaller than the sum of its proper divisors (190814164).

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

155556140 is a wasteful number, since it uses less digits than its factorization.

155556140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6858 (or 6856 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 155556140 is about 12472.2147191267. The cubic root of 155556140 is about 537.8102222164.

The spelling of 155556140 in words is "one hundred fifty-five million, five hundred fifty-six thousand, one hundred forty".