369285920721 has 63 divisors (see below), whose sum is σ = 563360826763. Its totient is φ = 241957452240.

The previous prime is 369285920699. The next prime is 369285920747. The reversal of 369285920721 is 127029582963.

The square root of 369285920721 is 607689.

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

369285920721 is a `hidden beast` number, since 3 + 6 + 9 + 28 + 592 + 0 + 7 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20671250625 + 348614670096 = 143775^2 + 590436^2 .

It is a de Polignac number, because none of the positive numbers 2^k-369285920721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (369285920771) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 1164939655 + ... + 1164939971.

Almost surely, 2^369285920721 is an apocalyptic number.

369285920721 is the 607689-th square number.

369285920721 is the 303845-th centered octagonal number.

It is an amenable number.

369285920721 is a deficient number, since it is larger than the sum of its proper divisors (194074906042).

369285920721 is an frugal number, since it uses more digits than its factorization.

369285920721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 369285920721 in words is "three hundred sixty-nine billion, two hundred eighty-five million, nine hundred twenty thousand, seven hundred twenty-one".