61538238115 has 8 divisors (see below), whose sum is σ = 75097511280. Its totient is φ = 48396173472.

The previous prime is 61538238079. The next prime is 61538238121. The reversal of 61538238115 is 51183283516.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61538238115 - 2²⁷ = 61404020387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104301804 + ... + 104302393.

It is an arithmetic number, because the mean of its divisors is an integer number (9387188910).

Almost surely, 2^61538238115 is an apocalyptic number.

61538238115 is a deficient number, since it is larger than the sum of its proper divisors (13559273165).

61538238115 is a wasteful number, since it uses less digits than its factorization.

61538238115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208604261.

The product of its digits is 172800, while the sum is 43.

The spelling of 61538238115 in words is "sixty-one billion, five hundred thirty-eight million, two hundred thirty-eight thousand, one hundred fifteen".