61147538 has 8 divisors (see below), whose sum is σ = 97116732. Its totient is φ = 28775296.

The previous prime is 61147507. The next prime is 61147561. The reversal of 61147538 is 83574116.

It can be written as a sum of positive squares in 2 ways, for example, as 51079609 + 10067929 = 7147^2 + 3173^2 .

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

It is a super-2 number, since 2×61147538² = 7478042806922888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61147498 and 61147507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 899195 + ... + 899262.

Almost surely, 2^61147538 is an apocalyptic number.

61147538 is a deficient number, since it is larger than the sum of its proper divisors (35969194).

61147538 is a wasteful number, since it uses less digits than its factorization.

61147538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798476.

The product of its digits is 20160, while the sum is 35.

The square root of 61147538 is about 7819.6891242555. The cubic root of 61147538 is about 393.9668305023.

The spelling of 61147538 in words is "sixty-one million, one hundred forty-seven thousand, five hundred thirty-eight".