245138705492836 has 9 divisors (see below), whose sum is σ = 428992789411641. Its totient is φ = 122569337089512.

The previous prime is 245138705492831. The next prime is 245138705492887. The reversal of 245138705492836 is 638294507831542.

The square root of 245138705492836 is 15656906.

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., 220750357828900 + 24388347663936 = 14857670^2 + 4938456^2 .

It is a super-4 number, since 4×245138705492836⁴ (a number of 59 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245138705492831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 27399586 + ... + 35228038.

It is a 1-persistent number, because it is pandigital, but 2⋅245138705492836 = 490277410985672 is not.

Almost surely, 2^{245138705492836} is an apocalyptic number.

245138705492836 is the 15656906-th square number.

It is an amenable number.

245138705492836 is a deficient number, since it is larger than the sum of its proper divisors (183854083918805).

245138705492836 is an frugal number, since it uses more digits than its factorization.

245138705492836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15656910 (or 7828455 counting only the distinct ones).

The product of its (nonzero) digits is 348364800, while the sum is 67.

The spelling of 245138705492836 in words is "two hundred forty-five trillion, one hundred thirty-eight billion, seven hundred five million, four hundred ninety-two thousand, eight hundred thirty-six".