3515981259025 has 9 divisors (see below), whose sum is σ = 4359828386811. Its totient is φ = 2812777506840.

The previous prime is 3515981258927. The next prime is 3515981259029. The reversal of 3515981259025 is 5209521895153.

The square root of 3515981259025 is 1875095.

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., 1265753253249 + 2250228005776 = 1125057^2 + 1500076^2 .

It is not a de Polignac number, because 3515981259025 - 2⁹ = 3515981258513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3515981259029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9187966 + ... + 9562984.

Almost surely, 2^{3515981259025} is an apocalyptic number.

3515981259025 is the 1875095-th square number.

3515981259025 is the 937548-th centered octagonal number.

It is an amenable number.

3515981259025 is a deficient number, since it is larger than the sum of its proper divisors (843847127786).

3515981259025 is an frugal number, since it uses more digits than its factorization.

3515981259025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750048 (or 375024 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 55.

The spelling of 3515981259025 in words is "three trillion, five hundred fifteen billion, nine hundred eighty-one million, two hundred fifty-nine thousand, twenty-five".