61513075824 has 40 divisors (see below), whose sum is σ = 158931358992. Its totient is φ = 20501445120.

The previous prime is 61513075823. The next prime is 61513075829. The reversal of 61513075824 is 42857031516.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61513075823) 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, 264604 + ... + 439364.

Almost surely, 2^61513075824 is an apocalyptic number.

It is an amenable number.

61513075824 is an abundant number, since it is smaller than the sum of its proper divisors (97418283168).

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

61513075824 is a wasteful number, since it uses less digits than its factorization.

61513075824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182105 (or 182099 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 61513075824 in words is "sixty-one billion, five hundred thirteen million, seventy-five thousand, eight hundred twenty-four".