1255560516 has 108 divisors (see below), whose sum is σ = 3791925228. Its totient is φ = 349017984.

The previous prime is 1255560487. The next prime is 1255560541. The reversal of 1255560516 is 6150655521.

It can be written as a sum of positive squares in 2 ways, for example, as 645668100 + 609892416 = 25410^2 + 24696^2 .

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

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, 55650 + ... + 74886.

Almost surely, 2^1255560516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255560516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895962614).

1255560516 is an abundant number, since it is smaller than the sum of its proper divisors (2536364712).

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

1255560516 is a wasteful number, since it uses less digits than its factorization.

1255560516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19298 (or 19286 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 1255560516 is about 35433.8893716171. The cubic root of 1255560516 is about 1078.8122848404.

The spelling of 1255560516 in words is "one billion, two hundred fifty-five million, five hundred sixty thousand, five hundred sixteen".