155725456 has 40 divisors (see below), whose sum is σ = 316229760. Its totient is φ = 74148096.

The previous prime is 155725411. The next prime is 155725499. The reversal of 155725456 is 654527551.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 95980 + ... + 97588.

It is an arithmetic number, because the mean of its divisors is an integer number (7905744).

Almost surely, 2^155725456 is an apocalyptic number.

155725456 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 155725456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158114880).

155725456 is an abundant number, since it is smaller than the sum of its proper divisors (160504304).

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

155725456 is a wasteful number, since it uses less digits than its factorization.

155725456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903 (or 1897 counting only the distinct ones).

The product of its digits is 210000, while the sum is 40.

The square root of 155725456 is about 12479.0006010097. Note that the first 3 decimals coincide. The cubic root of 155725456 is about 538.0052790350.

The spelling of 155725456 in words is "one hundred fifty-five million, seven hundred twenty-five thousand, four hundred fifty-six".