1213460664 has 128 divisors (see below), whose sum is σ = 3380106240. Its totient is φ = 360663552.

The previous prime is 1213460653. The next prime is 1213460681. The reversal of 1213460664 is 4660643121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1216614 + ... + 1217610.

It is an arithmetic number, because the mean of its divisors is an integer number (26407080).

Almost surely, 2^1213460664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213460664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1690053120).

1213460664 is an abundant number, since it is smaller than the sum of its proper divisors (2166645576).

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

1213460664 is a wasteful number, since it uses less digits than its factorization.

1213460664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 1213460664 is about 34834.7622928591. The cubic root of 1213460664 is about 1066.6171627199.

The spelling of 1213460664 in words is "one billion, two hundred thirteen million, four hundred sixty thousand, six hundred sixty-four".