61679530 has 32 divisors (see below), whose sum is σ = 122938560. Its totient is φ = 22091520.

The previous prime is 61679521. The next prime is 61679531. The reversal of 61679530 is 3597616.

It is a self number, because there is not a number n which added to its sum of digits gives 61679530.

It is not an unprimeable number, because it can be changed into a prime (61679531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3186 + ... + 11554.

It is an arithmetic number, because the mean of its divisors is an integer number (3841830).

Almost surely, 2^61679530 is an apocalyptic number.

61679530 is a deficient number, since it is larger than the sum of its proper divisors (61259030).

61679530 is a wasteful number, since it uses less digits than its factorization.

61679530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8454.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 61679530 is about 7853.6316440230. The cubic root of 61679530 is about 395.1060549492.

The spelling of 61679530 in words is "sixty-one million, six hundred seventy-nine thousand, five hundred thirty".