1213663464 has 48 divisors (see below), whose sum is σ = 3539854500. Its totient is φ = 373434624.

The previous prime is 1213663457. The next prime is 1213663481. The reversal of 1213663464 is 4643663121.

1213663464 is a `hidden beast` number, since 1 + 2 + 13 + 6 + 634 + 6 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1184048100 + 29615364 = 34410^2 + 5442^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 647389 + ... + 649260.

Almost surely, 2^1213663464 is an apocalyptic number.

It is an amenable number.

1213663464 is an abundant number, since it is smaller than the sum of its proper divisors (2326191036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213663464 is a wasteful number, since it uses less digits than its factorization.

1213663464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296674 (or 1296667 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 1213663464 is about 34837.6730566208. The cubic root of 1213663464 is about 1066.6765789877.

The spelling of 1213663464 in words is "one billion, two hundred thirteen million, six hundred sixty-three thousand, four hundred sixty-four".