1264653553 has 8 divisors (see below), whose sum is σ = 1274601440. Its totient is φ = 1254718080.

The previous prime is 1264653541. The next prime is 1264653589. The reversal of 1264653553 is 3553564621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1264653553 - 2⁹ = 1264653041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264653503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374593 + ... + 377953.

It is an arithmetic number, because the mean of its divisors is an integer number (159325180).

Almost surely, 2^1264653553 is an apocalyptic number.

It is an amenable number.

1264653553 is a deficient number, since it is larger than the sum of its proper divisors (9947887).

1264653553 is a wasteful number, since it uses less digits than its factorization.

1264653553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6207.

The product of its digits is 324000, while the sum is 40.

The square root of 1264653553 is about 35561.9677886362. The cubic root of 1264653553 is about 1081.4103525175.

The spelling of 1264653553 in words is "one billion, two hundred sixty-four million, six hundred fifty-three thousand, five hundred fifty-three".