255530061540 has 144 divisors (see below), whose sum is σ = 852492146688. Its totient is φ = 61561389312.

The previous prime is 255530061517. The next prime is 255530061593. The reversal of 255530061540 is 45160035552.

255530061540 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 30 + 0 + 615 + 4 + 0 = 666.

It is a super-2 number, since 2×255530061540² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 255530061495 and 255530061504.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1051732 + ... + 1271691.

It is an arithmetic number, because the mean of its divisors is an integer number (5920084352).

Almost surely, 2^255530061540 is an apocalyptic number.

255530061540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255530061540 is an abundant number, since it is smaller than the sum of its proper divisors (596962085148).

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

255530061540 is a wasteful number, since it uses less digits than its factorization.

255530061540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323498 (or 2323493 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 255530061540 in words is "two hundred fifty-five billion, five hundred thirty million, sixty-one thousand, five hundred forty".