1255664562 has 64 divisors (see below), whose sum is σ = 2639952000. Its totient is φ = 397651968.

The previous prime is 1255664561. The next prime is 1255664563. The reversal of 1255664562 is 2654665521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1255664561) and next prime (1255664563).

It is not an unprimeable number, because it can be changed into a prime (1255664561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4667764 + ... + 4668032.

It is an arithmetic number, because the mean of its divisors is an integer number (41249250).

Almost surely, 2^1255664562 is an apocalyptic number.

1255664562 is an abundant number, since it is smaller than the sum of its proper divisors (1384287438).

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

1255664562 is a wasteful number, since it uses less digits than its factorization.

1255664562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its digits is 432000, while the sum is 42.

The square root of 1255664562 is about 35435.3575119541. The cubic root of 1255664562 is about 1078.8420837499.

The spelling of 1255664562 in words is "one billion, two hundred fifty-five million, six hundred sixty-four thousand, five hundred sixty-two".