61838243652 has 12 divisors (see below), whose sum is σ = 144289235216. Its totient is φ = 20612747880.

The previous prime is 61838243629. The next prime is 61838243653. The reversal of 61838243652 is 25634283816.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (61838243653) 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 3 ways as a sum of consecutive naturals, for example, 2576593474 + ... + 2576593497.

Almost surely, 2^61838243652 is an apocalyptic number.

It is an amenable number.

61838243652 is an abundant number, since it is smaller than the sum of its proper divisors (82450991564).

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

61838243652 is a wasteful number, since it uses less digits than its factorization.

61838243652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153186978 (or 5153186976 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The spelling of 61838243652 in words is "sixty-one billion, eight hundred thirty-eight million, two hundred forty-three thousand, six hundred fifty-two".