61838243860 has 24 divisors (see below), whose sum is σ = 134049355776. Its totient is φ = 23937384480.

The previous prime is 61838243839. The next prime is 61838243861. The reversal of 61838243860 is 6834283816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61838243861) 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, 49868932 + ... + 49870171.

It is an arithmetic number, because the mean of its divisors is an integer number (5585389824).

Almost surely, 2^61838243860 is an apocalyptic number.

It is an amenable number.

61838243860 is an abundant number, since it is smaller than the sum of its proper divisors (72211111916).

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

61838243860 is a wasteful number, since it uses less digits than its factorization.

61838243860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99739143 (or 99739141 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 49.

The spelling of 61838243860 in words is "sixty-one billion, eight hundred thirty-eight million, two hundred forty-three thousand, eight hundred sixty".