61359143188 has 72 divisors (see below), whose sum is σ = 135483402600. Its totient is φ = 24146196480.

The previous prime is 61359143161. The next prime is 61359143227. The reversal of 61359143188 is 88134195316.

It can be written as a sum of positive squares in 4 ways, for example, as 8275904784 + 53083238404 = 90972^2 + 230398^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87963 + ... + 361186.

It is an arithmetic number, because the mean of its divisors is an integer number (1881713925).

Almost surely, 2^61359143188 is an apocalyptic number.

61359143188 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

61359143188 is an abundant number, since it is smaller than the sum of its proper divisors (74124259412).

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

61359143188 is a wasteful number, since it uses less digits than its factorization.

61359143188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449225 (or 449216 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The spelling of 61359143188 in words is "sixty-one billion, three hundred fifty-nine million, one hundred forty-three thousand, one hundred eighty-eight".