61205370556 has 24 divisors (see below), whose sum is σ = 119696537520. Its totient is φ = 27142070400.

The previous prime is 61205370547. The next prime is 61205370581. The reversal of 61205370556 is 65507350216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16961991 + ... + 16965598.

It is an arithmetic number, because the mean of its divisors is an integer number (4987355730).

Almost surely, 2^61205370556 is an apocalyptic number.

It is an amenable number.

61205370556 is a deficient number, since it is larger than the sum of its proper divisors (58491166964).

61205370556 is a wasteful number, since it uses less digits than its factorization.

61205370556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33927645 (or 33927643 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 40.

The spelling of 61205370556 in words is "sixty-one billion, two hundred five million, three hundred seventy thousand, five hundred fifty-six".