1264145553 has 24 divisors (see below), whose sum is σ = 1993657536. Its totient is φ = 765506400.

The previous prime is 1264145537. The next prime is 1264145569. The reversal of 1264145553 is 3555414621.

1264145553 is a `hidden beast` number, since 1 + 2 + 64 + 1 + 45 + 553 = 666.

It is an interprime number because it is at equal distance from previous prime (1264145537) and next prime (1264145569).

It is not a de Polignac number, because 1264145553 - 2⁴ = 1264145537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264145513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130663 + ... + 140003.

It is an arithmetic number, because the mean of its divisors is an integer number (83069064).

Almost surely, 2^1264145553 is an apocalyptic number.

It is an amenable number.

1264145553 is a deficient number, since it is larger than the sum of its proper divisors (729511983).

1264145553 is a wasteful number, since it uses less digits than its factorization.

1264145553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10725 (or 10722 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 1264145553 is about 35554.8246093269. The cubic root of 1264145553 is about 1081.2655355091.

The spelling of 1264145553 in words is "one billion, two hundred sixty-four million, one hundred forty-five thousand, five hundred fifty-three".