61679550 has 24 divisors (see below), whose sum is σ = 152965656. Its totient is φ = 16447840.

The previous prime is 61679543. The next prime is 61679561. The reversal of 61679550 is 5597616.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61679499 and 61679508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205449 + ... + 205748.

It is an arithmetic number, because the mean of its divisors is an integer number (6373569).

Almost surely, 2^61679550 is an apocalyptic number.

61679550 is an abundant number, since it is smaller than the sum of its proper divisors (91286106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61679550 is a wasteful number, since it uses less digits than its factorization.

61679550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411212 (or 411207 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 61679550 is about 7853.6329173192. The cubic root of 61679550 is about 395.1060976544.

The spelling of 61679550 in words is "sixty-one million, six hundred seventy-nine thousand, five hundred fifty".