1263651364 has 6 divisors (see below), whose sum is σ = 2211389894. Its totient is φ = 631825680.

The previous prime is 1263651313. The next prime is 1263651371. The reversal of 1263651364 is 4631563621.

It can be written as a sum of positive squares in only one way, i.e., 1020291364 + 243360000 = 31942^2 + 15600^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 157956417 + ... + 157956424.

Almost surely, 2^1263651364 is an apocalyptic number.

It is an amenable number.

1263651364 is a deficient number, since it is larger than the sum of its proper divisors (947738530).

1263651364 is a wasteful number, since it uses less digits than its factorization.

1263651364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315912845 (or 315912843 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 1263651364 is about 35547.8742543067. The cubic root of 1263651364 is about 1081.1246184082.

It can be divided in two parts, 12636 and 51364, that added together give a cube (64000 = 40³).

The spelling of 1263651364 in words is "one billion, two hundred sixty-three million, six hundred fifty-one thousand, three hundred sixty-four".