61549694516 has 24 divisors (see below), whose sum is σ = 108956311464. Its totient is φ = 30420316800.

The previous prime is 61549694497. The next prime is 61549694551.

61549694516 is nontrivially palindromic in base 10.

61549694516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23623690000 + 37926004516 = 153700^2 + 194746^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123386 + ... + 371918.

It is an arithmetic number, because the mean of its divisors is an integer number (4539846311).

Almost surely, 2^61549694516 is an apocalyptic number.

It is an amenable number.

61549694516 is a deficient number, since it is larger than the sum of its proper divisors (47406616948).

61549694516 is a wasteful number, since it uses less digits than its factorization.

61549694516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249251 (or 249249 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 56.

The spelling of 61549694516 in words is "sixty-one billion, five hundred forty-nine million, six hundred ninety-four thousand, five hundred sixteen".