61538415 has 8 divisors (see below), whose sum is σ = 98461488. Its totient is φ = 32820480.

The previous prime is 61538413. The next prime is 61538431. The reversal of 61538415 is 51483516.

61538415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 61538415 - 2¹ = 61538413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61538413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2051266 + ... + 2051295.

It is an arithmetic number, because the mean of its divisors is an integer number (12307686).

Almost surely, 2^61538415 is an apocalyptic number.

61538415 is a deficient number, since it is larger than the sum of its proper divisors (36923073).

61538415 is a wasteful number, since it uses less digits than its factorization.

61538415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4102569.

The product of its digits is 14400, while the sum is 33.

The square root of 61538415 is about 7844.6424392703. The cubic root of 61538415 is about 394.8045072260.

The spelling of 61538415 in words is "sixty-one million, five hundred thirty-eight thousand, four hundred fifteen".