61061956256 has 24 divisors (see below), whose sum is σ = 137389402080. Its totient is φ = 26169409728.

The previous prime is 61061956247. The next prime is 61061956289. The reversal of 61061956256 is 65265916016.

It is a self number, because there is not a number n which added to its sum of digits gives 61061956256.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136298786 + ... + 136299233.

It is an arithmetic number, because the mean of its divisors is an integer number (5724558420).

Almost surely, 2^61061956256 is an apocalyptic number.

It is an amenable number.

61061956256 is an abundant number, since it is smaller than the sum of its proper divisors (76327445824).

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

61061956256 is a wasteful number, since it uses less digits than its factorization.

61061956256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272598036 (or 272598028 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 47.

The spelling of 61061956256 in words is "sixty-one billion, sixty-one million, nine hundred fifty-six thousand, two hundred fifty-six".