39115505469121 has 3 divisors (see below), whose sum is σ = 39115511723361. Its totient is φ = 39115499214882.

The previous prime is 39115505469107. The next prime is 39115505469301. The reversal of 39115505469121 is 12196450551193.

The square root of 39115505469121 is 6254239.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 39115505469121 - 2³¹ = 39113357985473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39115505469101) 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, 3127120 + ... + 9381358.

It is an arithmetic number, because the mean of its divisors is an integer number (13038503907787).

Almost surely, 2^{39115505469121} is an apocalyptic number.

39115505469121 is the 6254239-th square number.

39115505469121 is the 3127120-th centered octagonal number.

It is an amenable number.

39115505469121 is a deficient number, since it is larger than the sum of its proper divisors (6254240).

39115505469121 is an frugal number, since it uses more digits than its factorization.

39115505469121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12508478 (or 6254239 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 52.

The spelling of 39115505469121 in words is "thirty-nine trillion, one hundred fifteen billion, five hundred five million, four hundred sixty-nine thousand, one hundred twenty-one".