61205652005978 has 32 divisors (see below), whose sum is σ = 93551259484800. Its totient is φ = 30027535082496.

The previous prime is 61205652005951. The next prime is 61205652005983. The reversal of 61205652005978 is 87950025650216.

61205652005978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61205652005978² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 69840818 + ... + 70711746.

It is an arithmetic number, because the mean of its divisors is an integer number (2923476858900).

Almost surely, 2^{61205652005978} is an apocalyptic number.

61205652005978 is a deficient number, since it is larger than the sum of its proper divisors (32345607478822).

61205652005978 is a wasteful number, since it uses less digits than its factorization.

61205652005978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874166.

The product of its (nonzero) digits is 9072000, while the sum is 56.

The spelling of 61205652005978 in words is "sixty-one trillion, two hundred five billion, six hundred fifty-two million, five thousand, nine hundred seventy-eight".