61312686 has 16 divisors (see below), whose sum is σ = 124636368. Its totient is φ = 20102400.

The previous prime is 61312661. The next prime is 61312697. The reversal of 61312686 is 68621316.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83395 + ... + 84126.

It is an arithmetic number, because the mean of its divisors is an integer number (7789773).

Almost surely, 2^61312686 is an apocalyptic number.

61312686 is an abundant number, since it is smaller than the sum of its proper divisors (63323682).

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

61312686 is a wasteful number, since it uses less digits than its factorization.

61312686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167587.

The product of its digits is 10368, while the sum is 33.

The square root of 61312686 is about 7830.2417587198. The cubic root of 61312686 is about 394.3211884472.

The spelling of 61312686 in words is "sixty-one million, three hundred twelve thousand, six hundred eighty-six".