61853660 has 24 divisors (see below), whose sum is σ = 141701616. Its totient is φ = 22492160.

The previous prime is 61853657. The next prime is 61853669. The reversal of 61853660 is 6635816.

It is a self number, because there is not a number n which added to its sum of digits gives 61853660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61853669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140357 + ... + 140796.

It is an arithmetic number, because the mean of its divisors is an integer number (5904234).

Almost surely, 2^61853660 is an apocalyptic number.

It is an amenable number.

61853660 is an abundant number, since it is smaller than the sum of its proper divisors (79847956).

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

61853660 is a wasteful number, since it uses less digits than its factorization.

61853660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281173 (or 281171 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 61853660 is about 7864.7097848554. The cubic root of 61853660 is about 395.4775189494.

The spelling of 61853660 in words is "sixty-one million, eight hundred fifty-three thousand, six hundred sixty".