61539634 has 16 divisors (see below), whose sum is σ = 100896768. Its totient is φ = 27978192.

The previous prime is 61539631. The next prime is 61539637. The reversal of 61539634 is 43693516.

It is an interprime number because it is at equal distance from previous prime (61539631) and next prime (61539637).

It is a junction number, because it is equal to n+sod(n) for n = 61539593 and 61539602.

It is not an unprimeable number, because it can be changed into a prime (61539631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15922 + ... + 19405.

It is an arithmetic number, because the mean of its divisors is an integer number (6306048).

Almost surely, 2^61539634 is an apocalyptic number.

61539634 is a deficient number, since it is larger than the sum of its proper divisors (39357134).

61539634 is a wasteful number, since it uses less digits than its factorization.

61539634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35409.

The product of its digits is 58320, while the sum is 37.

The square root of 61539634 is about 7844.7201352247. The cubic root of 61539634 is about 394.8071140720.

The spelling of 61539634 in words is "sixty-one million, five hundred thirty-nine thousand, six hundred thirty-four".