1260651855 has 32 divisors (see below), whose sum is σ = 2067715584. Its totient is φ = 655514496.

The previous prime is 1260651853. The next prime is 1260651869. The reversal of 1260651855 is 5581560621.

It is not a de Polignac number, because 1260651855 - 2¹ = 1260651853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260651853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 435222 + ... + 438108.

It is an arithmetic number, because the mean of its divisors is an integer number (64616112).

Almost surely, 2^1260651855 is an apocalyptic number.

1260651855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1260651855 is a deficient number, since it is larger than the sum of its proper divisors (807063729).

1260651855 is a wasteful number, since it uses less digits than its factorization.

1260651855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3615.

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 1260651855 is about 35505.6594784550. The cubic root of 1260651855 is about 1080.2685246225.

The spelling of 1260651855 in words is "one billion, two hundred sixty million, six hundred fifty-one thousand, eight hundred fifty-five".