61418312620 has 24 divisors (see below), whose sum is σ = 147403950624. Its totient is φ = 21057707136.

The previous prime is 61418312617. The next prime is 61418312629. The reversal of 61418312620 is 2621381416.

It is not an unprimeable number, because it can be changed into a prime (61418312629) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 219350977 + ... + 219351256.

It is an arithmetic number, because the mean of its divisors is an integer number (6141831276).

Almost surely, 2^61418312620 is an apocalyptic number.

It is an amenable number.

61418312620 is an abundant number, since it is smaller than the sum of its proper divisors (85985638004).

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

61418312620 is a wasteful number, since it uses less digits than its factorization.

61418312620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438702249 (or 438702247 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 61418312620 in words is "sixty-one billion, four hundred eighteen million, three hundred twelve thousand, six hundred twenty".