1361019664 has 45 divisors (see below), whose sum is σ = 2763503029. Its totient is φ = 649299200.

The previous prime is 1361019637. The next prime is 1361019689. The reversal of 1361019664 is 4669101631.

The square root of 1361019664 is 36892.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1347477264 + 13542400 = 36708^2 + 3680^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3393864 + ... + 3394264.

Almost surely, 2^1361019664 is an apocalyptic number.

1361019664 is the 36892-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1361019664

1361019664 is an abundant number, since it is smaller than the sum of its proper divisors (1402483365).

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

1361019664 is an frugal number, since it uses more digits than its factorization.

1361019664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The cubic root of 1361019664 is about 1108.2084738510.

The spelling of 1361019664 in words is "one billion, three hundred sixty-one million, nineteen thousand, six hundred sixty-four".