61538128 has 10 divisors (see below), whose sum is σ = 119230154. Its totient is φ = 30769056.

The previous prime is 61538101. The next prime is 61538129. The reversal of 61538128 is 82183516.

It can be written as a sum of positive squares in only one way, i.e., 52823824 + 8714304 = 7268^2 + 2952^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61538093 and 61538102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61538129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1923051 + ... + 1923082.

Almost surely, 2^61538128 is an apocalyptic number.

It is an amenable number.

61538128 is a deficient number, since it is larger than the sum of its proper divisors (57692026).

61538128 is a wasteful number, since it uses less digits than its factorization.

61538128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846141 (or 3846135 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 61538128 is about 7844.6241465095. The cubic root of 61538128 is about 394.8038934681.

The spelling of 61538128 in words is "sixty-one million, five hundred thirty-eight thousand, one hundred twenty-eight".