61443801072 has 40 divisors (see below), whose sum is σ = 176366467280. Its totient is φ = 20481266880.

The previous prime is 61443801071. The next prime is 61443801077. The reversal of 61443801072 is 27010834416.

61443801072 is a `hidden beast` number, since 61 + 443 + 80 + 10 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61443801071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71115079 + ... + 71115942.

It is an arithmetic number, because the mean of its divisors is an integer number (4409161682).

Almost surely, 2^61443801072 is an apocalyptic number.

It is an amenable number.

61443801072 is an abundant number, since it is smaller than the sum of its proper divisors (114922666208).

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

61443801072 is a wasteful number, since it uses less digits than its factorization.

61443801072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142231038 (or 142231026 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 61443801072 in words is "sixty-one billion, four hundred forty-three million, eight hundred one thousand, seventy-two".