61078715355764 has 24 divisors (see below), whose sum is σ = 107471367265920. Its totient is φ = 30372935152896.

The previous prime is 61078715355761. The next prime is 61078715355821. The reversal of 61078715355764 is 46755351787016.

It is a self number, because there is not a number n which added to its sum of digits gives 61078715355764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61078715355761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39838397 + ... + 41343140.

It is an arithmetic number, because the mean of its divisors is an integer number (4477973636080).

Almost surely, 2^{61078715355764} is an apocalyptic number.

It is an amenable number.

61078715355764 is a deficient number, since it is larger than the sum of its proper divisors (46392651910156).

61078715355764 is a wasteful number, since it uses less digits than its factorization.

61078715355764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81182567 (or 81182565 counting only the distinct ones).

The product of its (nonzero) digits is 148176000, while the sum is 65.

The spelling of 61078715355764 in words is "sixty-one trillion, seventy-eight billion, seven hundred fifteen million, three hundred fifty-five thousand, seven hundred sixty-four".