1264220456055 has 16 divisors (see below), whose sum is σ = 2110698501120. Its totient is φ = 644935652768.

The previous prime is 1264220456053. The next prime is 1264220456069. The reversal of 1264220456055 is 5506540224621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1264220456055 - 2¹ = 1264220456053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1264220455998 and 1264220456016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264220456053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1832203215 + ... + 1832203904.

It is an arithmetic number, because the mean of its divisors is an integer number (131918656320).

Almost surely, 2^{1264220456055} is an apocalyptic number.

1264220456055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1264220456055 is a deficient number, since it is larger than the sum of its proper divisors (846478045065).

1264220456055 is a wasteful number, since it uses less digits than its factorization.

1264220456055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664407150.

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 1264220456055 in words is "one trillion, two hundred sixty-four billion, two hundred twenty million, four hundred fifty-six thousand, fifty-five".