1613265780736 has 45 divisors (see below), whose sum is σ = 3226758275251. Its totient is φ = 806551601152.

The previous prime is 1613265780733. The next prime is 1613265780767. The reversal of 1613265780736 is 6370875623161.

It is a happy number.

The square root of 1613265780736 is 1270144.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1613265780733) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 162573471 + ... + 162583393.

Almost surely, 2^{1613265780736} is an apocalyptic number.

1613265780736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1613265780736 is the 1270144-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1613265780736

1613265780736 is an abundant number, since it is smaller than the sum of its proper divisors (1613492494515).

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

1613265780736 is an frugal number, since it uses more digits than its factorization.

1613265780736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19874 (or 9925 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 1613265780736 in words is "one trillion, six hundred thirteen billion, two hundred sixty-five million, seven hundred eighty thousand, seven hundred thirty-six".